diff --git a/ChangeLog.txt b/ChangeLog.txt
index 1167926dd..01ed50751 100644
--- a/ChangeLog.txt
+++ b/ChangeLog.txt
@@ -103,6 +103,7 @@
 - [#823] SVG Export - seam and cutting line of one piece missing.
 - Added submenu to quick access to piece node point angle type.
 - [#880] Fix broken seam allowance angle type.
+- [#882] VContainer class doesn't support multi document mode.
 
 # Version 0.5.0 May 9, 2017
 - [#581] User can now filter input lists by keyword in function wizard.
diff --git a/src/app/tape/tmainwindow.cpp b/src/app/tape/tmainwindow.cpp
index 665f0f639..e414c3ae3 100644
--- a/src/app/tape/tmainwindow.cpp
+++ b/src/app/tape/tmainwindow.cpp
@@ -250,11 +250,9 @@ bool TMainWindow::LoadFile(const QString &path)
 
         try
         {
-            data = new VContainer(qApp->TrVars(), &mUnit);
+            data = new VContainer(qApp->TrVars(), &mUnit, VContainer::UniqueNamespace());
 
             m = new VMeasurements(data);
-            m->SetSize(&currentSize);
-            m->SetHeight(&currentHeight);
             m->setXMLContent(path);
 
             mType = m->Type();
@@ -335,8 +333,7 @@ bool TMainWindow::LoadFile(const QString &path)
     }
     else
     {
-        qApp->NewMainWindow();
-        return qApp->MainWindow()->LoadFile(path);
+        return qApp->NewMainWindow()->LoadFile(path);
     }
 
     return true;
@@ -364,15 +361,13 @@ void TMainWindow::FileNew()
         pUnit = mUnit;
         mType = measurements.Type();
 
-        data = new VContainer(qApp->TrVars(), &mUnit);
+        data = new VContainer(qApp->TrVars(), &mUnit, VContainer::UniqueNamespace());
         currentHeight = measurements.BaseHeight();
         currentSize = measurements.BaseSize();
 
         if (mType == MeasurementsType::Multisize)
         {
             m = new VMeasurements(mUnit, measurements.BaseSize(), measurements.BaseHeight(), data);
-            m->SetSize(&currentSize);
-            m->SetHeight(&currentHeight);
             m_curFileFormatVersion = VVSTConverter::MeasurementMaxVer;
             m_curFileFormatVersionStr = VVSTConverter::MeasurementMaxVerStr;
         }
@@ -397,8 +392,7 @@ void TMainWindow::FileNew()
     }
     else
     {
-        qApp->NewMainWindow();
-        qApp->MainWindow()->FileNew();
+        qApp->NewMainWindow()->FileNew();
     }
 }
 
@@ -2093,13 +2087,13 @@ void TMainWindow::InitWindow()
 
         labelGradationHeights = new QLabel(tr("Height:"));
         gradationHeights = SetGradationList(labelGradationHeights, listHeights);
-        SetDefaultHeight(static_cast<int>(VContainer::height()));
+        SetDefaultHeight(static_cast<int>(data->height()));
         connect(gradationHeights, QOverload<const QString &>::of(&QComboBox::currentIndexChanged),
                 this, &TMainWindow::ChangedHeight);
 
         labelGradationSizes = new QLabel(tr("Size:"));
         gradationSizes = SetGradationList(labelGradationSizes, listSizes);
-        SetDefaultSize(static_cast<int>(VContainer::size()));
+        SetDefaultSize(static_cast<int>(data->size()));
         connect(gradationSizes, QOverload<const QString &>::of(&QComboBox::currentIndexChanged),
                 this, &TMainWindow::ChangedSize);
 
@@ -2433,7 +2427,7 @@ void TMainWindow::SetDefaultSize(int value)
 //---------------------------------------------------------------------------------------------------------------------
 void TMainWindow::RefreshData(bool freshCall)
 {
-    VContainer::ClearUniqueNames();
+    data->ClearUniqueNames();
     data->ClearVariables(VarType::Measurement);
     m->ReadMeasurements();
 
@@ -2894,11 +2888,9 @@ bool TMainWindow::LoadFromExistingFile(const QString &path)
 
         try
         {
-            data = new VContainer(qApp->TrVars(), &mUnit);
+            data = new VContainer(qApp->TrVars(), &mUnit, VContainer::UniqueNamespace());
 
             m = new VMeasurements(data);
-            m->SetSize(&currentSize);
-            m->SetHeight(&currentHeight);
             m->setXMLContent(path);
 
             mType = m->Type();
@@ -2975,8 +2967,7 @@ bool TMainWindow::LoadFromExistingFile(const QString &path)
     }
     else
     {
-        qApp->NewMainWindow();
-        return qApp->MainWindow()->LoadFile(path);
+        return qApp->NewMainWindow()->LoadFile(path);
     }
 
     return true;
@@ -3014,8 +3005,7 @@ void TMainWindow::CreateWindowMenu(QMenu *menu)
     QAction *action = menu->addAction(tr("&New Window"));
     connect(action, &QAction::triggered, this, []()
     {
-        qApp->NewMainWindow();
-        qApp->MainWindow()->activateWindow();
+        qApp->NewMainWindow()->activateWindow();
     });
     action->setMenuRole(QAction::NoRole);
     menu->addSeparator();
diff --git a/src/app/valentina/core/vtooloptionspropertybrowser.cpp b/src/app/valentina/core/vtooloptionspropertybrowser.cpp
index e3cc53600..248cc379c 100644
--- a/src/app/valentina/core/vtooloptionspropertybrowser.cpp
+++ b/src/app/valentina/core/vtooloptionspropertybrowser.cpp
@@ -677,7 +677,8 @@ void VToolOptionsPropertyBrowser::SetPointName(const QString &name)
         }
 
         QRegularExpression rx(NameRegExp());
-        if (name.isEmpty() || VContainer::IsUnique(name) == false || rx.match(name).hasMatch() == false)
+        if (name.isEmpty() || VContainer::IsUnique(name, valentinaNamespace) == false
+                || rx.match(name).hasMatch() == false)
         {
             idToProperty[AttrName]->setValue(i->name());
         }
@@ -704,7 +705,8 @@ void VToolOptionsPropertyBrowser::SetPointName1(const QString &name)
         }
 
         QRegularExpression rx(NameRegExp());
-        if (name.isEmpty() || VContainer::IsUnique(name) == false || rx.match(name).hasMatch() == false)
+        if (name.isEmpty() || VContainer::IsUnique(name, valentinaNamespace) == false
+                || rx.match(name).hasMatch() == false)
         {
             idToProperty[AttrName1]->setValue(i->nameP1());
         }
@@ -731,7 +733,8 @@ void VToolOptionsPropertyBrowser::SetPointName2(const QString &name)
         }
 
         QRegularExpression rx(NameRegExp());
-        if (name.isEmpty() || VContainer::IsUnique(name) == false || rx.match(name).hasMatch() == false)
+        if (name.isEmpty() || VContainer::IsUnique(name, valentinaNamespace) == false
+                || rx.match(name).hasMatch() == false)
         {
             idToProperty[AttrName2]->setValue(i->nameP2());
         }
@@ -764,11 +767,11 @@ void VToolOptionsPropertyBrowser::SetOperationSuffix(const QString &suffix)
         }
 
         QRegularExpression rx(NameRegExp());
-        const QStringList uniqueNames = VContainer::AllUniqueNames();
+        const QStringList uniqueNames = VContainer::AllUniqueNames(valentinaNamespace);
         for (auto &uniqueName : uniqueNames)
         {
             const QString name = uniqueName + suffix;
-            if (not rx.match(name).hasMatch() || not VContainer::IsUnique(name))
+            if (not rx.match(name).hasMatch() || not VContainer::IsUnique(name, valentinaNamespace))
             {
                 idToProperty[AttrSuffix]->setValue(item->Suffix());
                 return;
diff --git a/src/app/valentina/dialogs/dialogpatternproperties.cpp b/src/app/valentina/dialogs/dialogpatternproperties.cpp
index 9277a7051..dee43f51d 100644
--- a/src/app/valentina/dialogs/dialogpatternproperties.cpp
+++ b/src/app/valentina/dialogs/dialogpatternproperties.cpp
@@ -667,7 +667,7 @@ void DialogPatternProperties::SetDefaultHeight(const QString &def)
     }
     else
     {
-        const int height = static_cast<int>(VContainer::height());
+        const int height = static_cast<int>(pattern->height());
         index = ui->comboBoxHeight->findText(QString().setNum(height));
         if (index != -1)
         {
@@ -688,7 +688,7 @@ void DialogPatternProperties::SetDefaultSize(const QString &def)
     }
     else
     {
-        const int size = static_cast<int>(VContainer::size());
+        const int size = static_cast<int>(pattern->size());
         index = ui->comboBoxSize->findText(QString().setNum(size));
         if (index != -1)
         {
diff --git a/src/app/valentina/dialogs/vwidgetgroups.cpp b/src/app/valentina/dialogs/vwidgetgroups.cpp
index 70f156457..b5aedac34 100644
--- a/src/app/valentina/dialogs/vwidgetgroups.cpp
+++ b/src/app/valentina/dialogs/vwidgetgroups.cpp
@@ -112,7 +112,9 @@ void VWidgetGroups::CtxMenu(const QPoint &pos)
     QAction *selectedAction = menu->exec(ui->tableWidget->viewport()->mapToGlobal(pos));
     if (selectedAction == actionRename)
     {
-        DialogGroup *dialog = new DialogGroup(new VContainer(qApp->TrVars(), qApp->patternUnitP()), NULL_ID, this);
+        DialogGroup *dialog = new DialogGroup(new VContainer(qApp->TrVars(), qApp->patternUnitP(),
+                                                             VContainer::UniqueNamespace()),
+                                              NULL_ID, this);
         dialog->SetName(doc->GetGroupName(id));
         const int result = dialog->exec();
 
diff --git a/src/app/valentina/mainwindow.cpp b/src/app/valentina/mainwindow.cpp
index ffc8cba54..06fcc2c5b 100644
--- a/src/app/valentina/mainwindow.cpp
+++ b/src/app/valentina/mainwindow.cpp
@@ -444,8 +444,8 @@ bool MainWindow::LoadMeasurements(const QString &path)
 
     if (m->Type() == MeasurementsType::Multisize)
     {
-        VContainer::SetSize(UnitConvertor(m->BaseSize(), m->MUnit(), *m->GetData()->GetPatternUnit()));
-        VContainer::SetHeight(UnitConvertor(m->BaseHeight(), m->MUnit(), *m->GetData()->GetPatternUnit()));
+        pattern->SetSize(UnitConvertor(m->BaseSize(), m->MUnit(), *m->GetData()->GetPatternUnit()));
+        pattern->SetHeight(UnitConvertor(m->BaseHeight(), m->MUnit(), *m->GetData()->GetPatternUnit()));
 
         doc->SetPatternWasChanged(true);
         emit doc->UpdatePatternLabel();
@@ -500,8 +500,8 @@ bool MainWindow::UpdateMeasurements(const QString &path, int size, int height)
 
     if (m->Type() == MeasurementsType::Multisize)
     {
-        VContainer::SetSize(size);
-        VContainer::SetHeight(height);
+        pattern->SetSize(size);
+        pattern->SetHeight(height);
 
         doc->SetPatternWasChanged(true);
         emit doc->UpdatePatternLabel();
@@ -1143,7 +1143,7 @@ void MainWindow::ClosedDialogGroup(int result)
     {
         const QPointer<DialogGroup> dialog = qobject_cast<DialogGroup *>(dialogTool);
         SCASSERT(not dialog.isNull())
-        const QDomElement group = doc->CreateGroup(VContainer::getNextId(), dialog->GetName(), dialog->GetGroup());
+        const QDomElement group = doc->CreateGroup(pattern->getNextId(), dialog->GetName(), dialog->GetGroup());
         if (not group.isNull())
         {
             AddGroup *addGroup = new AddGroup(group, doc);
@@ -1733,9 +1733,9 @@ void MainWindow::ShowMeasurements()
                     << "-u"
                     << UnitsToStr(qApp->patternUnit())
                     << "-e"
-                    << QString().setNum(static_cast<int>(UnitConvertor(VContainer::height(), doc->MUnit(), Unit::Cm)))
+                    << QString().setNum(static_cast<int>(UnitConvertor(pattern->height(), doc->MUnit(), Unit::Cm)))
                     << "-s"
-                    << QString().setNum(static_cast<int>(UnitConvertor(VContainer::size(), doc->MUnit(), Unit::Cm)));
+                    << QString().setNum(static_cast<int>(UnitConvertor(pattern->size(), doc->MUnit(), Unit::Cm)));
         }
         else
         {
@@ -1796,7 +1796,7 @@ void MainWindow::SyncMeasurements()
     if (mChanges)
     {
         const QString path = AbsoluteMPath(qApp->GetPatternPath(), doc->MPath());
-        if(UpdateMeasurements(path, static_cast<int>(VContainer::size()), static_cast<int>(VContainer::height())))
+        if(UpdateMeasurements(path, static_cast<int>(pattern->size()), static_cast<int>(pattern->height())))
         {
             if (not watcher->files().contains(path))
             {
@@ -3378,9 +3378,9 @@ void MainWindow::PatternChangesWereSaved(bool saved)
  */
 void MainWindow::ChangedSize(const QString & text)
 {
-    const int size = static_cast<int>(VContainer::size());
+    const int size = static_cast<int>(pattern->size());
     if (UpdateMeasurements(AbsoluteMPath(qApp->GetPatternPath(), doc->MPath()), text.toInt(),
-                           static_cast<int>(VContainer::height())))
+                           static_cast<int>(pattern->height())))
     {
         doc->LiteParseTree(Document::LiteParse);
         emit sceneDetails->DimensionsChanged();
@@ -3408,8 +3408,8 @@ void MainWindow::ChangedSize(const QString & text)
  */
 void MainWindow::ChangedHeight(const QString &text)
 {
-    const int height = static_cast<int>(VContainer::height());
-    if (UpdateMeasurements(AbsoluteMPath(qApp->GetPatternPath(), doc->MPath()), static_cast<int>(VContainer::size()),
+    const int height = static_cast<int>(pattern->height());
+    if (UpdateMeasurements(AbsoluteMPath(qApp->GetPatternPath(), doc->MPath()), static_cast<int>(pattern->size()),
                            text.toInt()))
     {
         doc->LiteParseTree(Document::LiteParse);
@@ -3456,13 +3456,13 @@ void MainWindow::SetDefaultHeight()
     }
     else
     {
-        index = gradationHeights->findText(QString().setNum(VContainer::height()));
+        index = gradationHeights->findText(QString().setNum(pattern->height()));
         if (index != -1)
         {
             gradationHeights->setCurrentIndex(index);
         }
     }
-    VContainer::SetHeight(gradationHeights->currentText().toInt());
+    pattern->SetHeight(gradationHeights->currentText().toInt());
 }
 
 //---------------------------------------------------------------------------------------------------------------------
@@ -3476,13 +3476,13 @@ void MainWindow::SetDefaultSize()
     }
     else
     {
-        index = gradationSizes->findText(QString().setNum(VContainer::size()));
+        index = gradationSizes->findText(QString().setNum(pattern->size()));
         if (index != -1)
         {
             gradationSizes->setCurrentIndex(index);
         }
     }
-    VContainer::SetSize(gradationSizes->currentText().toInt());
+    pattern->SetSize(gradationSizes->currentText().toInt());
 }
 
 //---------------------------------------------------------------------------------------------------------------------
@@ -4423,8 +4423,6 @@ bool MainWindow::LoadPattern(QString fileName, const QString& customMeasureFile)
         // Here comes undocumented Valentina's feature.
         // Because app bundle in Mac OS X doesn't allow setup assosiation for Tape we must do this through Valentina
         VMeasurements m(pattern);
-        m.SetSize(VContainer::rsize());
-        m.SetHeight(VContainer::rheight());
         m.setXMLContent(fileName);
 
         if (m.Type() == MeasurementsType::Multisize || m.Type() == MeasurementsType::Individual)
@@ -4960,8 +4958,6 @@ QString MainWindow::CheckPathToMeasurements(const QString &patternPath, const QS
                 else
                 {
                     QScopedPointer<VMeasurements> m(new VMeasurements(pattern));
-                    m->SetSize(VContainer::rsize());
-                    m->SetHeight(VContainer::rheight());
                     m->setXMLContent(mPath);
 
                     patternType = m->Type();
diff --git a/src/app/valentina/mainwindowsnogui.cpp b/src/app/valentina/mainwindowsnogui.cpp
index 4b97a45fb..06301cf90 100644
--- a/src/app/valentina/mainwindowsnogui.cpp
+++ b/src/app/valentina/mainwindowsnogui.cpp
@@ -112,7 +112,7 @@ MainWindowsNoGUI::MainWindowsNoGUI(QWidget *parent)
       listDetails(),
       currentScene(nullptr),
       tempSceneLayout(nullptr),
-      pattern(new VContainer(qApp->TrVars(), qApp->patternUnitP())),
+      pattern(new VContainer(qApp->TrVars(), qApp->patternUnitP(), valentinaNamespace)),
       doc(nullptr),
       papers(),
       shadows(),
@@ -1665,20 +1665,20 @@ void MainWindowsNoGUI::SetSizeHeightForIndividualM() const
 
     if (vars->contains(size_M))
     {
-        VContainer::SetSize(*vars->value(size_M)->GetValue());
+        pattern->SetSize(*vars->value(size_M)->GetValue());
     }
     else
     {
-        VContainer::SetSize(0);
+        pattern->SetSize(0);
     }
 
     if (vars->contains(height_M))
     {
-        VContainer::SetHeight(*vars->value(height_M)->GetValue());
+        pattern->SetHeight(*vars->value(height_M)->GetValue());
     }
     else
     {
-        VContainer::SetHeight(0);
+        pattern->SetHeight(0);
     }
 
     doc->SetPatternWasChanged(true);
@@ -1776,8 +1776,6 @@ QSharedPointer<VMeasurements> MainWindowsNoGUI::OpenMeasurementFile(const QStrin
     try
     {
         m = QSharedPointer<VMeasurements>(new VMeasurements(pattern));
-        m->SetSize(VContainer::rsize());
-        m->SetHeight(VContainer::rheight());
         m->setXMLContent(path);
 
         if (m->Type() == MeasurementsType::Unknown)
diff --git a/src/app/valentina/xml/vpattern.cpp b/src/app/valentina/xml/vpattern.cpp
index cdbef7422..2c3d58f1a 100644
--- a/src/app/valentina/xml/vpattern.cpp
+++ b/src/app/valentina/xml/vpattern.cpp
@@ -337,14 +337,14 @@ VContainer VPattern::GetCompleteData() const
     const int countPP = CountPP();
     if (countPP <= 0 || history.isEmpty() || tools.isEmpty())
     {
-        return (data != nullptr ? *data : VContainer(nullptr, nullptr));
+        return (data != nullptr ? *data : VContainer(nullptr, nullptr, VContainer::UniqueNamespace()));
     }
 
     const quint32 id = (countPP == 1 ? history.last().getId() : LastToolId());
 
     if (id == NULL_ID)
     {
-        return (data != nullptr ? *data : VContainer(nullptr, nullptr));
+        return (data != nullptr ? *data : VContainer(nullptr, nullptr, VContainer::UniqueNamespace()));
     }
 
     try
@@ -354,7 +354,7 @@ VContainer VPattern::GetCompleteData() const
     catch (VExceptionBadId &e)
     {
         Q_UNUSED(e)
-        return (data != nullptr ? *data : VContainer(nullptr, nullptr));
+        return (data != nullptr ? *data : VContainer(nullptr, nullptr, VContainer::UniqueNamespace()));
     }
 
     const VDataTool *vTool = tools.value(id);
@@ -455,7 +455,7 @@ void VPattern::LiteParseIncrements()
     {
         emit SetEnabledGUI(true);
 
-        VContainer::ClearUniqueIncrementNames();
+        data->ClearUniqueIncrementNames();
         data->ClearVariables(VarType::Increment);
 
         QDomNodeList tags = elementsByTagName(TagIncrements);
@@ -3998,7 +3998,7 @@ QString VPattern::GenerateLabel(const LabelType &type, const QString &reservedNa
 QString VPattern::GenerateSuffix() const
 {
     const QString suffixBase = GetLabelBase(static_cast<quint32>(GetIndexActivPP())).toLower();
-    const QStringList uniqueNames = VContainer::AllUniqueNames();
+    const QStringList uniqueNames = data->AllUniqueNames();
     qint32 num = 1;
     QString suffix;
     for (;;)
@@ -4258,7 +4258,7 @@ void VPattern::PrepareForParse(const Document &parse)
     }
     else if (parse == Document::LiteParse)
     {
-        VContainer::ClearUniqueNames();
+        data->ClearUniqueNames();
         Q_STATIC_ASSERT_X(static_cast<int>(VarType::Unknown) == 8, "Check that you used all types");
         data->ClearVariables(QVector<VarType>({VarType::Increment,
                                                VarType::LineAngle,
diff --git a/src/libs/ifc/xml/vabstractpattern.cpp b/src/libs/ifc/xml/vabstractpattern.cpp
index 43bf112a3..aa555a0e5 100644
--- a/src/libs/ifc/xml/vabstractpattern.cpp
+++ b/src/libs/ifc/xml/vabstractpattern.cpp
@@ -447,7 +447,7 @@ void VAbstractPattern::ParseGroups(const QDomElement &domElement)
             {
                 if (domElement.tagName() == TagGroup)
                 {
-                    VContainer::UpdateId(GetParametrUInt(domElement, AttrId, NULL_ID_STR));
+                    VContainer::UpdateId(GetParametrUInt(domElement, AttrId, NULL_ID_STR), valentinaNamespace);
 
                     const QPair<bool, QMap<quint32, quint32> > groupData = ParseItemElement(domElement);
                     const QMap<quint32, quint32> group = groupData.second;
diff --git a/src/libs/vformat/vmeasurements.cpp b/src/libs/vformat/vmeasurements.cpp
index a9764111d..38f8f576c 100644
--- a/src/libs/vformat/vmeasurements.cpp
+++ b/src/libs/vformat/vmeasurements.cpp
@@ -99,9 +99,7 @@ QString FileComment()
 VMeasurements::VMeasurements(VContainer *data)
     :VDomDocument(),
       data(data),
-      type(MeasurementsType::Unknown),
-      m_currentSize(nullptr),
-      m_currentHeight(nullptr)
+      type(MeasurementsType::Unknown)
 {
     SCASSERT(data != nullptr)
 }
@@ -110,9 +108,7 @@ VMeasurements::VMeasurements(VContainer *data)
 VMeasurements::VMeasurements(Unit unit, VContainer *data)
     :VDomDocument(),
       data(data),
-      type(MeasurementsType::Individual),
-      m_currentSize(nullptr),
-      m_currentHeight(nullptr)
+      type(MeasurementsType::Individual)
 {
     SCASSERT(data != nullptr)
 
@@ -123,9 +119,7 @@ VMeasurements::VMeasurements(Unit unit, VContainer *data)
 VMeasurements::VMeasurements(Unit unit, int baseSize, int baseHeight, VContainer *data)
     :VDomDocument(),
       data(data),
-      type(MeasurementsType::Multisize),
-      m_currentSize(nullptr),
-      m_currentHeight(nullptr)
+      type(MeasurementsType::Multisize)
 {
     SCASSERT(data != nullptr)
 
@@ -262,7 +256,8 @@ void VMeasurements::ReadMeasurements() const
     // That's why we need two containers: one for converted values, second for real data.
 
     // Container for values in measurement file's unit
-    QScopedPointer<VContainer> tempData(new VContainer(data->GetTrVars(), data->GetPatternUnit()));
+    QScopedPointer<VContainer> tempData(new VContainer(data->GetTrVars(), data->GetPatternUnit(),
+                                                       VContainer::UniqueNamespace()));
 
     const QDomNodeList list = elementsByTagName(TagMeasurement);
     for (int i=0; i < list.size(); ++i)
@@ -283,8 +278,6 @@ void VMeasurements::ReadMeasurements() const
 
             tempMeash = QSharedPointer<VMeasurement>(new VMeasurement(static_cast<quint32>(i), name, BaseSize(),
                                                                       BaseHeight(), base, ksize, kheight));
-            tempMeash->SetSize(m_currentSize);
-            tempMeash->SetHeight(m_currentHeight);
             tempMeash->SetUnit(data->GetPatternUnit());
 
             base = UnitConvertor(base, MUnit(), *data->GetPatternUnit());
@@ -296,8 +289,6 @@ void VMeasurements::ReadMeasurements() const
 
             meash = QSharedPointer<VMeasurement>(new VMeasurement(static_cast<quint32>(i), name, baseSize, baseHeight,
                                                                   base, ksize, kheight, fullName, description));
-            meash->SetSize(m_currentSize);
-            meash->SetHeight(m_currentHeight);
             meash->SetUnit(data->GetPatternUnit());
         }
         else
@@ -477,18 +468,6 @@ void VMeasurements::SetReadOnly(bool ro)
     }
 }
 
-//---------------------------------------------------------------------------------------------------------------------
-void VMeasurements::SetSize(qreal *size)
-{
-    m_currentSize = size;
-}
-
-//---------------------------------------------------------------------------------------------------------------------
-void VMeasurements::SetHeight(qreal *height)
-{
-    m_currentHeight = height;
-}
-
 //---------------------------------------------------------------------------------------------------------------------
 void VMeasurements::SetMName(const QString &name, const QString &text)
 {
diff --git a/src/libs/vformat/vmeasurements.h b/src/libs/vformat/vmeasurements.h
index 941257c5b..9ba19442d 100644
--- a/src/libs/vformat/vmeasurements.h
+++ b/src/libs/vformat/vmeasurements.h
@@ -90,9 +90,6 @@ public:
     bool    IsReadOnly() const;
     void    SetReadOnly(bool ro);
 
-    void SetSize(qreal *size);
-    void SetHeight(qreal *height);
-
     void SetMName(const QString &name, const QString &text);
     void SetMValue(const QString &name, const QString &text);
     void SetMBaseValue(const QString &name, double value);
@@ -145,9 +142,6 @@ private:
     VContainer     *data;
     MeasurementsType type;
 
-    qreal *m_currentSize;
-    qreal *m_currentHeight;
-
     void CreateEmptyMultisizeFile(Unit unit, int baseSize, int baseHeight);
     void CreateEmptyIndividualFile(Unit unit);
 
diff --git a/src/libs/vlayout/vtextmanager.cpp b/src/libs/vlayout/vtextmanager.cpp
index 248339e81..e65124ecf 100644
--- a/src/libs/vlayout/vtextmanager.cpp
+++ b/src/libs/vlayout/vtextmanager.cpp
@@ -96,14 +96,14 @@ QMap<QString, QString> PreparePlaceholders(const VAbstractPattern *doc)
     QString mExt;
     if (qApp->patternType() == MeasurementsType::Multisize)
     {
-        curSize = QString::number(VContainer::size());
-        curHeight = QString::number(VContainer::height());
+        curSize = QString::number(VContainer::size(valentinaNamespace));
+        curHeight = QString::number(VContainer::height(valentinaNamespace));
         mExt = "vst";
     }
     else if (qApp->patternType() == MeasurementsType::Individual)
     {
-        curSize = QString::number(VContainer::size());
-        curHeight = QString::number(VContainer::height());
+        curSize = QString::number(VContainer::size(valentinaNamespace));
+        curHeight = QString::number(VContainer::height(valentinaNamespace));
         mExt = "vit";
     }
 
diff --git a/src/libs/vmisc/def.cpp b/src/libs/vmisc/def.cpp
index e3f0f906f..0cd21827e 100644
--- a/src/libs/vmisc/def.cpp
+++ b/src/libs/vmisc/def.cpp
@@ -202,6 +202,8 @@ const QString unitCM   = QStringLiteral("cm");
 const QString unitINCH = QStringLiteral("inch");
 const QString unitPX   = QStringLiteral("px");
 
+const QString valentinaNamespace = QStringLiteral("valentina");
+
 //---------------------------------------------------------------------------------------------------------------------
 QPixmap QPixmapFromCache(const QString &pixmapPath)
 {
diff --git a/src/libs/vmisc/def.h b/src/libs/vmisc/def.h
index e038e1b4f..7796a6d96 100644
--- a/src/libs/vmisc/def.h
+++ b/src/libs/vmisc/def.h
@@ -417,6 +417,8 @@ extern const QString unitCM;
 extern const QString unitINCH;
 extern const QString unitPX;
 
+extern const QString valentinaNamespace;
+
 QPixmap QPixmapFromCache(const QString &pixmapPath);
 void SetItemOverrideCursor(QGraphicsItem *item, const QString & pixmapPath, int hotX = -1, int hotY = -1);
 
diff --git a/src/libs/vpatterndb/variables/vincrement.cpp b/src/libs/vpatterndb/variables/vincrement.cpp
index 718c488fe..0f1cae2f2 100644
--- a/src/libs/vpatterndb/variables/vincrement.cpp
+++ b/src/libs/vpatterndb/variables/vincrement.cpp
@@ -104,7 +104,7 @@ bool VIncrement::IsFormulaOk() const
 //---------------------------------------------------------------------------------------------------------------------
 VContainer *VIncrement::GetData()
 {
-    return &d->data;
+    return d->data.data();
 }
 
 //---------------------------------------------------------------------------------------------------------------------
diff --git a/src/libs/vpatterndb/variables/vincrement_p.h b/src/libs/vpatterndb/variables/vincrement_p.h
index b9e04dedd..4a8c9daf3 100644
--- a/src/libs/vpatterndb/variables/vincrement_p.h
+++ b/src/libs/vpatterndb/variables/vincrement_p.h
@@ -48,7 +48,7 @@ public:
           formula(QString()),
           formulaOk(false),
           previewCalculation(false),
-          data(VContainer(nullptr, nullptr))
+          data()
     {}
 
     VIncrementData(VContainer *data, quint32 index, const QString &formula, bool ok)
@@ -56,17 +56,17 @@ public:
           formula(formula),
           formulaOk(ok),
           previewCalculation(false),
-          data(*data)
+          data(QSharedPointer<VContainer>(new VContainer(*data)))
     {
         // When we create an increment in the dialog it will get neccesary data. Such data must be removed because will
         // confuse a user. Increment should not know nothing about internal variables.
         Q_STATIC_ASSERT_X(static_cast<int>(VarType::Unknown) == 8, "Check that you used all types");
-        this->data.ClearVariables(QVector<VarType>({VarType::LineAngle,
-                                                    VarType::LineLength,
-                                                    VarType::CurveLength,
-                                                    VarType::CurveCLength,
-                                                    VarType::ArcRadius,
-                                                    VarType::CurveAngle}));
+        this->data->ClearVariables(QVector<VarType>({VarType::LineAngle,
+                                                     VarType::LineLength,
+                                                     VarType::CurveLength,
+                                                     VarType::CurveCLength,
+                                                     VarType::ArcRadius,
+                                                     VarType::CurveAngle}));
     }
 
     VIncrementData(const VIncrementData &incr)
@@ -85,7 +85,7 @@ public:
     QString formula;
     bool    formulaOk;
     bool    previewCalculation;
-    VContainer data;
+    QSharedPointer<VContainer> data;
 
 private:
     VIncrementData &operator=(const VIncrementData &) Q_DECL_EQ_DELETE;
diff --git a/src/libs/vpatterndb/variables/vmeasurement.cpp b/src/libs/vpatterndb/variables/vmeasurement.cpp
index 080d0a517..1f1d877e1 100644
--- a/src/libs/vpatterndb/variables/vmeasurement.cpp
+++ b/src/libs/vpatterndb/variables/vmeasurement.cpp
@@ -307,19 +307,7 @@ qreal *VMeasurement::GetValue()
 //---------------------------------------------------------------------------------------------------------------------
 VContainer *VMeasurement::GetData()
 {
-    return &d->data;
-}
-
-//---------------------------------------------------------------------------------------------------------------------
-void VMeasurement::SetSize(qreal *size)
-{
-    d->currentSize = size;
-}
-
-//---------------------------------------------------------------------------------------------------------------------
-void VMeasurement::SetHeight(qreal *height)
-{
-    d->currentHeight = height;
+    return d->data.data();
 }
 
 //---------------------------------------------------------------------------------------------------------------------
diff --git a/src/libs/vpatterndb/variables/vmeasurement.h b/src/libs/vpatterndb/variables/vmeasurement.h
index 9e9dea817..a4b3af4b5 100644
--- a/src/libs/vpatterndb/variables/vmeasurement.h
+++ b/src/libs/vpatterndb/variables/vmeasurement.h
@@ -87,8 +87,6 @@ public:
 
     VContainer *GetData();
 
-    void SetSize(qreal *size);
-    void SetHeight(qreal *height);
     void SetUnit(const Unit *unit);
 
     qreal   GetBase() const;
diff --git a/src/libs/vpatterndb/variables/vmeasurement_p.h b/src/libs/vpatterndb/variables/vmeasurement_p.h
index 6917c1ed3..1b77eb703 100644
--- a/src/libs/vpatterndb/variables/vmeasurement_p.h
+++ b/src/libs/vpatterndb/variables/vmeasurement_p.h
@@ -44,7 +44,7 @@ public:
 
     VMeasurementData(quint32 index, const QString &gui_text, const QString &tagName, qreal baseSize, qreal baseHeight,
                      qreal base, qreal ksize, qreal kheight )
-        : data(VContainer(nullptr, nullptr)),
+        : data(),
           index(index),
           formula(),
           gui_text(gui_text),
@@ -62,7 +62,7 @@ public:
 
     VMeasurementData(VContainer *data, quint32 index, const QString &formula, bool ok, const QString &gui_text,
                      const QString &tagName, qreal base)
-        : data(*data),
+        : data(QSharedPointer<VContainer>(new VContainer(*data))),
           index(index),
           formula(formula),
           gui_text(gui_text),
@@ -98,7 +98,7 @@ public:
 
     virtual  ~VMeasurementData();
 
-    VContainer data;
+    QSharedPointer<VContainer> data;
     quint32 index;
     QString formula;
     QString gui_text;
diff --git a/src/libs/vpatterndb/vcontainer.cpp b/src/libs/vpatterndb/vcontainer.cpp
index ba44d3055..cbfb0c5cc 100644
--- a/src/libs/vpatterndb/vcontainer.cpp
+++ b/src/libs/vpatterndb/vcontainer.cpp
@@ -31,6 +31,7 @@
 #include <limits.h>
 #include <QVector>
 #include <QtDebug>
+#include <QUuid>
 
 #include "../ifc/exception/vexception.h"
 #include "../vgeometry/vabstractcubicbezierpath.h"
@@ -63,18 +64,54 @@ Q_LOGGING_CATEGORY(vCon, "v.container")
 
 QT_WARNING_POP
 
-quint32 VContainer::_id = NULL_ID;
-qreal VContainer::_size = 50;
-qreal VContainer::_height = 176;
-QSet<QString> VContainer::uniqueNames = QSet<QString>();
+QMap<QString, quint32> VContainer::_id = QMap<QString, quint32>();
+QMap<QString, qreal> VContainer::_size = QMap<QString, qreal>();
+QMap<QString, qreal> VContainer::_height = QMap<QString, qreal>();
+QMap<QString, QSet<QString>> VContainer::uniqueNames = QMap<QString, QSet<QString>>();
+QMap<QString, quint32> VContainer::copyCounter = QMap<QString, quint32>();
 
 //---------------------------------------------------------------------------------------------------------------------
 /**
  * @brief VContainer create empty container
  */
-VContainer::VContainer(const VTranslateVars *trVars, const Unit *patternUnit)
-    :d(new VContainerData(trVars, patternUnit))
-{}
+VContainer::VContainer(const VTranslateVars *trVars, const Unit *patternUnit, const QString &nspace)
+    :d(new VContainerData(trVars, patternUnit, nspace))
+{
+    if (nspace.isEmpty())
+    {
+        qFatal("Namesapce is empty.");
+    }
+
+    if (VContainer::_id.contains(nspace))
+    {
+        qFatal("Namespace is not unique.");
+    }
+
+    if (not _id.contains(d->nspace))
+    {
+        _id[d->nspace] = NULL_ID;
+    }
+
+    if (not _size.contains(d->nspace))
+    {
+        _size[d->nspace] = 50;
+    }
+
+    if (not _height.contains(d->nspace))
+    {
+        _height[d->nspace] = 176;
+    }
+
+    if (not uniqueNames.contains(d->nspace))
+    {
+        uniqueNames[d->nspace] = QSet<QString>();
+    }
+
+    if (not copyCounter.contains(d->nspace))
+    {
+        copyCounter[d->nspace] = 1;
+    }
+}
 
 //---------------------------------------------------------------------------------------------------------------------
 /**
@@ -89,6 +126,7 @@ VContainer &VContainer::operator =(const VContainer &data)
         return *this;
     }
     d = data.d;
+    ++copyCounter[d->nspace];
     return *this;
 }
 
@@ -99,12 +137,36 @@ VContainer &VContainer::operator =(const VContainer &data)
  */
 VContainer::VContainer(const VContainer &data)
     :d(data.d)
-{}
+{
+    ++copyCounter[d->nspace];
+}
 
 //---------------------------------------------------------------------------------------------------------------------
 VContainer::~VContainer()
 {}
 
+//---------------------------------------------------------------------------------------------------------------------
+QString VContainer::UniqueNamespace()
+{
+    QString candidate;
+    do
+    {
+        candidate = QUuid::createUuid().toString();
+    }
+    while(_size.contains(candidate));
+
+    return candidate;
+}
+
+//---------------------------------------------------------------------------------------------------------------------
+void VContainer::ClearNamespace(const QString &nspace)
+{
+    _id.remove(nspace);
+    _size.remove(nspace);
+    _height.remove(nspace);
+    uniqueNames.remove(nspace);
+}
+
 //---------------------------------------------------------------------------------------------------------------------
 /**
  * @brief GetGObject returns a point by id
@@ -203,7 +265,7 @@ quint32 VContainer::AddGObject(const QSharedPointer<VGObject> &obj)
         return NULL_ID;
     }
 
-    uniqueNames.insert(obj->name());
+    uniqueNames[d->nspace].insert(obj->name());
     const quint32 id = getNextId();
     obj->setId(id);
 
@@ -236,9 +298,9 @@ quint32 VContainer::AddPiecePath(const VPiecePath &path)
 }
 
 //---------------------------------------------------------------------------------------------------------------------
-quint32 VContainer::getId()
+quint32 VContainer::getId() const
 {
-    return _id;
+    return _id.value(d->nspace);
 }
 
 //---------------------------------------------------------------------------------------------------------------------
@@ -246,17 +308,33 @@ quint32 VContainer::getId()
  * @brief getNextId generate next unique id
  * @return next unique id
  */
-quint32 VContainer::getNextId()
+quint32 VContainer::getNextId() const
 {
     //TODO. Current count of ids are very big and allow us save time before someone will reach its max value.
     //Better way, of cource, is to seek free ids inside the set of values and reuse them.
     //But for now better to keep it as it is now.
-    if (_id == UINT_MAX)
+    if (_id.value(d->nspace) == UINT_MAX)
     {
         qCritical()<<(tr("Number of free id exhausted."));
     }
-    _id++;
-    return _id;
+    _id[d->nspace]++;
+    return _id.value(d->nspace);
+}
+
+//---------------------------------------------------------------------------------------------------------------------
+void VContainer::UpdateId(quint32 newId, const QString &nspace)
+{
+    if (_id.contains(nspace))
+    {
+        if (newId > _id.value(nspace))
+        {
+           _id[nspace] = newId;
+        }
+    }
+    else
+    {
+        throw VException(QStringLiteral("Unknown namespace"));
+    }
 }
 
 //---------------------------------------------------------------------------------------------------------------------
@@ -264,12 +342,9 @@ quint32 VContainer::getNextId()
  * @brief UpdateId update id. If new id bigger when current save new like current.
  * @param newId id
  */
-void VContainer::UpdateId(quint32 newId)
+void VContainer::UpdateId(quint32 newId) const
 {
-    if (newId > _id)
-    {
-       _id = newId;
-    }
+    VContainer::UpdateId(newId, d->nspace);
 }
 
 //---------------------------------------------------------------------------------------------------------------------
@@ -279,7 +354,7 @@ void VContainer::UpdateId(quint32 newId)
 void VContainer::Clear()
 {
     qCDebug(vCon, "Clearing container data.");
-    _id = NULL_ID;
+    _id[d->nspace] = NULL_ID;
 
     d->pieces->clear();
     d->piecePaths->clear();
@@ -292,7 +367,7 @@ void VContainer::Clear()
 void VContainer::ClearForFullParse()
 {
     qCDebug(vCon, "Clearing container data for full parse.");
-    _id = NULL_ID;
+    _id[d->nspace] = NULL_ID;
 
     d->pieces->clear();
     d->piecePaths->clear();
@@ -552,17 +627,43 @@ const QMap<QString, QSharedPointer<VCurveAngle> > VContainer::DataAnglesCurves()
 }
 
 //---------------------------------------------------------------------------------------------------------------------
-bool VContainer::IsUnique(const QString &name)
+bool VContainer::IsUnique(const QString &name) const
 {
-    return (!uniqueNames.contains(name) && !builInFunctions.contains(name));
+    return VContainer::IsUnique(name, d->nspace);
 }
 
 //---------------------------------------------------------------------------------------------------------------------
-QStringList VContainer::AllUniqueNames()
+bool VContainer::IsUnique(const QString &name, const QString &nspace)
 {
-    QStringList names = builInFunctions;
-    names.append(uniqueNames.toList());
-    return names;
+    if (uniqueNames.contains(nspace))
+    {
+        return (!uniqueNames.value(nspace).contains(name) && !builInFunctions.contains(name));
+    }
+    else
+    {
+        throw VException(QStringLiteral("Unknown namespace"));
+    }
+}
+
+//---------------------------------------------------------------------------------------------------------------------
+QStringList VContainer::AllUniqueNames() const
+{
+    return AllUniqueNames(d->nspace);
+}
+
+//---------------------------------------------------------------------------------------------------------------------
+QStringList VContainer::AllUniqueNames(const QString &nspace)
+{
+    if (uniqueNames.contains(nspace))
+    {
+        QStringList names = builInFunctions;
+        names.append(uniqueNames.value(nspace).toList());
+        return names;
+    }
+    else
+    {
+        throw VException(QStringLiteral("Unknown namespace"));
+    }
 }
 
 //---------------------------------------------------------------------------------------------------------------------
@@ -596,22 +697,22 @@ const QMap<QString, QSharedPointer<T> > VContainer::DataVar(const VarType &type)
 }
 
 //---------------------------------------------------------------------------------------------------------------------
-void VContainer::ClearUniqueNames()
+void VContainer::ClearUniqueNames() const
 {
-    uniqueNames.clear();
+    uniqueNames[d->nspace].clear();
 }
 
 //---------------------------------------------------------------------------------------------------------------------
-void VContainer::ClearUniqueIncrementNames()
+void VContainer::ClearUniqueIncrementNames() const
 {
-    const QList<QString> list = uniqueNames.toList();
+    const QList<QString> list = uniqueNames.value(d->nspace).toList();
     ClearUniqueNames();
 
     for(auto &name : list)
     {
         if (not name.startsWith('#'))
         {
-            uniqueNames.insert(name);
+            uniqueNames[d->nspace].insert(name);
         }
     }
 }
@@ -621,9 +722,9 @@ void VContainer::ClearUniqueIncrementNames()
  * @brief SetSize set value of size
  * @param size value of size
  */
-void VContainer::SetSize(qreal size)
+void VContainer::SetSize(qreal size) const
 {
-    _size = size;
+    _size[d->nspace] = size;
 }
 
 //---------------------------------------------------------------------------------------------------------------------
@@ -631,9 +732,9 @@ void VContainer::SetSize(qreal size)
  * @brief SetGrowth set value of growth
  * @param height value of height
  */
-void VContainer::SetHeight(qreal height)
+void VContainer::SetHeight(qreal height) const
 {
-    _height = height;
+    _height[d->nspace] = height;
 }
 
 //---------------------------------------------------------------------------------------------------------------------
@@ -641,15 +742,22 @@ void VContainer::SetHeight(qreal height)
  * @brief size return size
  * @return size in mm
  */
-qreal VContainer::size()
+qreal VContainer::size() const
 {
-    return _size;
+    return VContainer::size(d->nspace);
 }
 
 //---------------------------------------------------------------------------------------------------------------------
-qreal *VContainer::rsize()
+qreal VContainer::size(const QString &nspace)
 {
-    return &_size;
+    if (_size.contains(nspace))
+    {
+        return _size.value(nspace);
+    }
+    else
+    {
+        throw VException(QStringLiteral("Unknown namespace"));
+    }
 }
 
 //---------------------------------------------------------------------------------------------------------------------
@@ -657,15 +765,22 @@ qreal *VContainer::rsize()
  * @brief height return height
  * @return height in pattern units
  */
-qreal VContainer::height()
+qreal VContainer::height() const
 {
-    return _height;
+    return VContainer::height(d->nspace);
 }
 
 //---------------------------------------------------------------------------------------------------------------------
-qreal *VContainer::rheight()
+qreal VContainer::height(const QString &nspace)
 {
-    return &_height;
+    if (_height.contains(nspace))
+    {
+        return _height.value(nspace);
+    }
+    else
+    {
+        throw VException(QStringLiteral("Unknown namespace"));
+    }
 }
 
 //---------------------------------------------------------------------------------------------------------------------
@@ -692,4 +807,14 @@ const QHash<QString, QSharedPointer<VInternalVariable> > *VContainer::DataVariab
 
 //---------------------------------------------------------------------------------------------------------------------
 VContainerData::~VContainerData()
-{}
+{
+    if (ref == 0)
+    {
+        --VContainer::copyCounter[nspace];
+    }
+
+    if (VContainer::copyCounter.value(nspace) == 0)
+    {
+        VContainer::ClearNamespace(nspace);
+    }
+}
diff --git a/src/libs/vpatterndb/vcontainer.h b/src/libs/vpatterndb/vcontainer.h
index 264d23adb..77cc8606e 100644
--- a/src/libs/vpatterndb/vcontainer.h
+++ b/src/libs/vpatterndb/vcontainer.h
@@ -68,14 +68,15 @@ class VContainerData : public QSharedData //-V690
 {
 public:
 
-    VContainerData(const VTranslateVars *trVars, const Unit *patternUnit)
+    VContainerData(const VTranslateVars *trVars, const Unit *patternUnit, const QString &nspace)
         : calculationObjects(QHash<quint32, QSharedPointer<VGObject> >()),
           modelingObjects(QSharedPointer<QHash<quint32, QSharedPointer<VGObject>>>::create()),
           variables(QHash<QString, QSharedPointer<VInternalVariable> > ()),
           pieces(QSharedPointer<QHash<quint32, VPiece>>::create()),
           piecePaths(QSharedPointer<QHash<quint32, VPiecePath>>::create()),
           trVars(trVars),
-          patternUnit(patternUnit)
+          patternUnit(patternUnit),
+          nspace(nspace)
     {}
 
     VContainerData(const VContainerData &data)
@@ -86,7 +87,8 @@ public:
           pieces(data.pieces),
           piecePaths(data.piecePaths),
           trVars(data.trVars),
-          patternUnit(data.patternUnit)
+          patternUnit(data.patternUnit),
+          nspace(data.nspace)
     {}
 
     virtual ~VContainerData();
@@ -105,6 +107,9 @@ public:
     const VTranslateVars *trVars;
     const Unit *patternUnit;
 
+    /** @brief nspace namespace for static variables */
+    QString nspace;
+
 private:
     VContainerData &operator=(const VContainerData &) Q_DECL_EQ_DELETE;
 };
@@ -118,10 +123,12 @@ class VContainer
 {
     Q_DECLARE_TR_FUNCTIONS(VContainer)
 public:
-    VContainer(const VTranslateVars *trVars, const Unit *patternUnit);
+    VContainer(const VTranslateVars *trVars, const Unit *patternUnit, const QString &nspace);
     VContainer(const VContainer &data);
     ~VContainer();
 
+    friend class VContainerData;
+
     VContainer &operator=(const VContainer &data);
 #ifdef Q_COMPILER_RVALUE_REFS
     VContainer &operator=(VContainer &&data) Q_DECL_NOTHROW { Swap(data); return *this; }
@@ -130,6 +137,8 @@ public:
     inline void Swap(VContainer &data) Q_DECL_NOTHROW
     { std::swap(d, data.d); }
 
+    static QString UniqueNamespace();
+
     template <typename T>
     const QSharedPointer<T> GeometricObject(const quint32 &id) const;
     const QSharedPointer<VGObject> GetGObject(quint32 id) const;
@@ -139,9 +148,10 @@ public:
     quint32            GetPieceForPiecePath(quint32 id) const;
     template <typename T>
     QSharedPointer<T>  GetVariable(QString name) const;
-    static quint32     getId();
-    static quint32     getNextId();
-    static void        UpdateId(quint32 newId);
+    quint32            getId() const;
+    quint32            getNextId() const;
+    void               UpdateId(quint32 newId) const;
+    static void        UpdateId(quint32 newId, const QString &nspace);
 
     quint32            AddGObject(VGObject *obj);
     quint32            AddGObject(const QSharedPointer<VGObject> &obj);
@@ -174,15 +184,15 @@ public:
     void               ClearCalculationGObjects();
     void               ClearVariables(const VarType &type = VarType::Unknown);
     void               ClearVariables(const QVector<VarType> &types);
-    static void        ClearUniqueNames();
-    static void        ClearUniqueIncrementNames();
+    void               ClearUniqueNames() const;
+    void               ClearUniqueIncrementNames() const;
 
-    static void        SetSize(qreal size);
-    static void        SetHeight(qreal height);
-    static qreal       size();
-    static qreal      *rsize();
-    static qreal       height();
-    static qreal      *rheight();
+    void               SetSize(qreal size) const;
+    void               SetHeight(qreal height) const;
+    qreal              size() const;
+    static qreal       size(const QString &nspace);
+    qreal              height() const;
+    static qreal       height(const QString &nspace);
 
     void               RemoveIncrement(const QString& name);
 
@@ -199,8 +209,11 @@ public:
     const QMap<QString, QSharedPointer<VArcRadius> >    DataRadiusesArcs() const;
     const QMap<QString, QSharedPointer<VCurveAngle> >   DataAnglesCurves() const;
 
-    static bool        IsUnique(const QString &name);
-    static QStringList AllUniqueNames();
+    bool        IsUnique(const QString &name) const;
+    static bool IsUnique(const QString &name, const QString &nspace);
+
+    QStringList        AllUniqueNames() const;
+    static QStringList AllUniqueNames(const QString &nspace);
 
     const Unit *GetPatternUnit() const;
     const VTranslateVars *GetTrVars() const;
@@ -209,10 +222,11 @@ private:
     /**
      * @brief _id current id. New object will have value +1. For empty class equal 0.
      */
-    static quint32 _id;
-    static qreal   _size;
-    static qreal   _height;
-    static QSet<QString> uniqueNames;
+    static QMap<QString, quint32> _id;
+    static QMap<QString, qreal>   _size;
+    static QMap<QString, qreal>   _height;
+    static QMap<QString, QSet<QString>> uniqueNames;
+    static QMap<QString, quint32> copyCounter;
 
     QSharedDataPointer<VContainerData> d;
 
@@ -226,6 +240,8 @@ private:
 
     template <typename T>
     const QMap<QString, QSharedPointer<T> > DataVar(const VarType &type) const;
+
+    static void ClearNamespace(const QString &nspace);
 };
 
 Q_DECLARE_TYPEINFO(VContainer, Q_MOVABLE_TYPE);
@@ -324,7 +340,7 @@ void VContainer::AddVariable(const QString& name, const QSharedPointer<T> &var)
         d->variables.insert(name, var);
     }
 
-    uniqueNames.insert(name);
+    uniqueNames[d->nspace].insert(name);
 }
 
 //---------------------------------------------------------------------------------------------------------------------
@@ -353,7 +369,7 @@ void VContainer::UpdateGObject(quint32 id, const QSharedPointer<T> &obj)
 {
     SCASSERT(not obj.isNull())
     UpdateObject(id, obj);
-    uniqueNames.insert(obj->name());
+    uniqueNames[d->nspace].insert(obj->name());
 }
 
 //---------------------------------------------------------------------------------------------------------------------
diff --git a/src/libs/vtools/dialogs/support/dialogeditlabel.cpp b/src/libs/vtools/dialogs/support/dialogeditlabel.cpp
index 64e59481b..01337f153 100644
--- a/src/libs/vtools/dialogs/support/dialogeditlabel.cpp
+++ b/src/libs/vtools/dialogs/support/dialogeditlabel.cpp
@@ -521,14 +521,14 @@ void DialogEditLabel::InitPlaceholders()
     QString mExt;
     if (qApp->patternType() == MeasurementsType::Multisize)
     {
-        curSize = QString::number(VContainer::size());
-        curHeight = QString::number(VContainer::height());
+        curSize = QString::number(VContainer::size(valentinaNamespace));
+        curHeight = QString::number(VContainer::height(valentinaNamespace));
         mExt = "vst";
     }
     else if (qApp->patternType() == MeasurementsType::Individual)
     {
-        curSize = QString::number(VContainer::size());
-        curHeight = QString::number(VContainer::height());
+        curSize = QString::number(VContainer::size(valentinaNamespace));
+        curHeight = QString::number(VContainer::height(valentinaNamespace));
         mExt = "vit";
     }
 
diff --git a/src/libs/vtools/dialogs/tools/dialogflippingbyaxis.cpp b/src/libs/vtools/dialogs/tools/dialogflippingbyaxis.cpp
index 8ac04c5c2..ce8f593c0 100644
--- a/src/libs/vtools/dialogs/tools/dialogflippingbyaxis.cpp
+++ b/src/libs/vtools/dialogs/tools/dialogflippingbyaxis.cpp
@@ -253,7 +253,7 @@ void DialogFlippingByAxis::SuffixChanged()
             if (m_suffix != suffix)
             {
                 QRegularExpression rx(NameRegExp());
-                const QStringList uniqueNames = VContainer::AllUniqueNames();
+                const QStringList uniqueNames = data->AllUniqueNames();
                 for (auto &uniqueName : uniqueNames)
                 {
                     const QString name = uniqueName + suffix;
diff --git a/src/libs/vtools/dialogs/tools/dialogflippingbyline.cpp b/src/libs/vtools/dialogs/tools/dialogflippingbyline.cpp
index 0131c55ff..c7cdfeb27 100644
--- a/src/libs/vtools/dialogs/tools/dialogflippingbyline.cpp
+++ b/src/libs/vtools/dialogs/tools/dialogflippingbyline.cpp
@@ -280,7 +280,7 @@ void DialogFlippingByLine::SuffixChanged()
             if (m_suffix != suffix)
             {
                 QRegularExpression rx(NameRegExp());
-                const QStringList uniqueNames = VContainer::AllUniqueNames();
+                const QStringList uniqueNames = data->AllUniqueNames();
                 for (auto &uniqueName : uniqueNames)
                 {
                     const QString name = uniqueName + suffix;
diff --git a/src/libs/vtools/dialogs/tools/dialogmove.cpp b/src/libs/vtools/dialogs/tools/dialogmove.cpp
index 58fcda56f..69f4a911d 100644
--- a/src/libs/vtools/dialogs/tools/dialogmove.cpp
+++ b/src/libs/vtools/dialogs/tools/dialogmove.cpp
@@ -473,7 +473,7 @@ void DialogMove::SuffixChanged()
             if (m_suffix != suffix)
             {
                 QRegularExpression rx(NameRegExp());
-                const QStringList uniqueNames = VContainer::AllUniqueNames();
+                const QStringList uniqueNames = data->AllUniqueNames();
                 for (auto &uniqueName : uniqueNames)
                 {
                     const QString name = uniqueName + suffix;
diff --git a/src/libs/vtools/dialogs/tools/dialogrotation.cpp b/src/libs/vtools/dialogs/tools/dialogrotation.cpp
index 7caafe2d1..018f7ad21 100644
--- a/src/libs/vtools/dialogs/tools/dialogrotation.cpp
+++ b/src/libs/vtools/dialogs/tools/dialogrotation.cpp
@@ -335,7 +335,7 @@ void DialogRotation::SuffixChanged()
             if (m_suffix != suffix)
             {
                 QRegularExpression rx(NameRegExp());
-                const QStringList uniqueNames = VContainer::AllUniqueNames();
+                const QStringList uniqueNames = data->AllUniqueNames();
                 for (auto &uniqueName : uniqueNames)
                 {
                     const QString name = uniqueName + suffix;
diff --git a/src/libs/vtools/tools/drawTools/operation/flipping/vabstractflipping.cpp b/src/libs/vtools/tools/drawTools/operation/flipping/vabstractflipping.cpp
index 4ca9cfdb4..696b29d10 100644
--- a/src/libs/vtools/tools/drawTools/operation/flipping/vabstractflipping.cpp
+++ b/src/libs/vtools/tools/drawTools/operation/flipping/vabstractflipping.cpp
@@ -53,7 +53,7 @@ void VAbstractFlipping::CreateDestination(VAbstractOperationInitData &initData,
     {
         initData.destination.clear();// Try to avoid mistake, value must be empty
 
-        initData.id = VContainer::getNextId();//Just reserve id for tool
+        initData.id = initData.data->getNextId();//Just reserve id for tool
 
         for (auto idObject : qAsConst(initData.source))
         {
diff --git a/src/libs/vtools/tools/drawTools/operation/vtoolmove.cpp b/src/libs/vtools/tools/drawTools/operation/vtoolmove.cpp
index 0d9461f7d..ffcb79caf 100644
--- a/src/libs/vtools/tools/drawTools/operation/vtoolmove.cpp
+++ b/src/libs/vtools/tools/drawTools/operation/vtoolmove.cpp
@@ -197,7 +197,7 @@ VToolMove *VToolMove::Create(VToolMoveInitData &initData)
     {
         initData.destination.clear();// Try to avoid mistake, value must be empty
 
-        initData.id = VContainer::getNextId();//Just reserve id for tool
+        initData.id = initData.data->getNextId();//Just reserve id for tool
 
         for (auto idObject : qAsConst(initData.source))
         {
diff --git a/src/libs/vtools/tools/drawTools/operation/vtoolrotation.cpp b/src/libs/vtools/tools/drawTools/operation/vtoolrotation.cpp
index 353be5a85..44e71454f 100644
--- a/src/libs/vtools/tools/drawTools/operation/vtoolrotation.cpp
+++ b/src/libs/vtools/tools/drawTools/operation/vtoolrotation.cpp
@@ -142,7 +142,7 @@ VToolRotation *VToolRotation::Create(VToolRotationInitData &initData)
     {
         initData.destination.clear();// Try to avoid mistake, value must be empty
 
-        initData.id = VContainer::getNextId();//Just reserve id for tool
+        initData.id = initData.data->getNextId();//Just reserve id for tool
 
         for (auto idObject : qAsConst(initData.source))
         {
diff --git a/src/libs/vtools/tools/drawTools/toolpoint/tooldoublepoint/vtooltruedarts.cpp b/src/libs/vtools/tools/drawTools/toolpoint/tooldoublepoint/vtooltruedarts.cpp
index c36e26646..3835790da 100644
--- a/src/libs/vtools/tools/drawTools/toolpoint/tooldoublepoint/vtooltruedarts.cpp
+++ b/src/libs/vtools/tools/drawTools/toolpoint/tooldoublepoint/vtooltruedarts.cpp
@@ -162,7 +162,7 @@ VToolTrueDarts *VToolTrueDarts::Create(VToolTrueDartsInitData initData)
 
     if (initData.typeCreation == Source::FromGui)
     {
-        initData.id = VContainer::getNextId();//Just reserve id for tool
+        initData.id = initData.data->getNextId();//Just reserve id for tool
         initData.p1id = initData.data->AddGObject(p1);
         initData.p2id = initData.data->AddGObject(p2);
     }
diff --git a/src/libs/vtools/tools/drawTools/toolpoint/toolsinglepoint/toolcut/vtoolcutarc.cpp b/src/libs/vtools/tools/drawTools/toolpoint/toolsinglepoint/toolcut/vtoolcutarc.cpp
index 129f4539c..3091a56d6 100644
--- a/src/libs/vtools/tools/drawTools/toolpoint/toolsinglepoint/toolcut/vtoolcutarc.cpp
+++ b/src/libs/vtools/tools/drawTools/toolpoint/toolsinglepoint/toolcut/vtoolcutarc.cpp
@@ -139,8 +139,8 @@ VToolCutArc* VToolCutArc::Create(VToolCutArcInitData &initData)
     if (initData.typeCreation == Source::FromGui)
     {
         initData.id = initData.data->AddGObject(p);
-        a1->setId(VContainer::getNextId());
-        a2->setId(VContainer::getNextId());
+        a1->setId(initData.data->getNextId());
+        a2->setId(initData.data->getNextId());
         initData.data->AddArc(a1, a1->id(), initData.id);
         initData.data->AddArc(a2, a2->id(), initData.id);
     }
diff --git a/src/libs/vtools/tools/drawTools/toolpoint/toolsinglepoint/toollinepoint/vtoolcurveintersectaxis.cpp b/src/libs/vtools/tools/drawTools/toolpoint/toolsinglepoint/toollinepoint/vtoolcurveintersectaxis.cpp
index ae0bf77d8..34abae584 100644
--- a/src/libs/vtools/tools/drawTools/toolpoint/toolsinglepoint/toollinepoint/vtoolcurveintersectaxis.cpp
+++ b/src/libs/vtools/tools/drawTools/toolpoint/toolsinglepoint/toollinepoint/vtoolcurveintersectaxis.cpp
@@ -155,8 +155,8 @@ VToolCurveIntersectAxis *VToolCurveIntersectAxis::Create(VToolCurveIntersectAxis
         initData.id = initData.data->AddGObject(p);
         initData.data->AddLine(initData.basePointId, initData.id);
 
-        VContainer::getNextId();
-        VContainer::getNextId();
+        initData.data->getNextId();
+        initData.data->getNextId();
         InitSegments(curve->getType(), segLength, p, initData.curveId, initData.data);
     }
     else
diff --git a/src/libs/vtools/tools/drawTools/vtoolline.cpp b/src/libs/vtools/tools/drawTools/vtoolline.cpp
index 324bcda90..a8452ea12 100644
--- a/src/libs/vtools/tools/drawTools/vtoolline.cpp
+++ b/src/libs/vtools/tools/drawTools/vtoolline.cpp
@@ -140,12 +140,12 @@ VToolLine * VToolLine::Create(VToolLineInitData initData)
     SCASSERT(initData.data != nullptr)
     if (initData.typeCreation == Source::FromGui)
     {
-        initData.id = VContainer::getNextId();
+        initData.id = initData.data->getNextId();
         initData.data->AddLine(initData.firstPoint, initData.secondPoint);
     }
     else
     {
-        VContainer::UpdateId(initData.id);
+        initData.data->UpdateId(initData.id);
         initData.data->AddLine(initData.firstPoint, initData.secondPoint);
         if (initData.parse != Document::FullParse)
         {
diff --git a/src/libs/vtools/tools/vtooluniondetails.cpp b/src/libs/vtools/tools/vtooluniondetails.cpp
index d3033aad1..ef9b10a11 100644
--- a/src/libs/vtools/tools/vtooluniondetails.cpp
+++ b/src/libs/vtools/tools/vtooluniondetails.cpp
@@ -1763,7 +1763,7 @@ VToolUnionDetails* VToolUnionDetails::Create(VToolUnionDetailsInitData initData)
     VToolUnionDetails *unionDetails = nullptr;
     if (initData.typeCreation == Source::FromGui)
     {
-        initData.id = VContainer::getNextId();
+        initData.id = initData.data->getNextId();
     }
     else
     {
diff --git a/src/test/ValentinaTest/tst_vmeasurements.cpp b/src/test/ValentinaTest/tst_vmeasurements.cpp
index 652cbb82b..69fd07b35 100644
--- a/src/test/ValentinaTest/tst_vmeasurements.cpp
+++ b/src/test/ValentinaTest/tst_vmeasurements.cpp
@@ -50,14 +50,13 @@ void TST_VMeasurements::CreateEmptyMultisizeFile()
     const int height = 176;
     const int size = 50;
 
-    QSharedPointer<VContainer> data = QSharedPointer<VContainer>(new VContainer(nullptr, &mUnit));
-    VContainer::SetHeight(height);
-    VContainer::SetSize(size);
+    QSharedPointer<VContainer> data = QSharedPointer<VContainer>(new VContainer(nullptr, &mUnit,
+                                                                                VContainer::UniqueNamespace()));
+    data->SetHeight(height);
+    data->SetSize(size);
 
     QSharedPointer<VMeasurements> m =
             QSharedPointer<VMeasurements>(new VMeasurements(mUnit, size, height, data.data()));
-    m->SetSize(VContainer::rsize());
-    m->SetHeight(VContainer::rheight());
 
     QTemporaryFile file;
     QString fileName;
@@ -97,7 +96,8 @@ void TST_VMeasurements::CreateEmptyIndividualFile()
 {
     Unit mUnit = Unit::Cm;
 
-    QSharedPointer<VContainer> data = QSharedPointer<VContainer>(new VContainer(nullptr, &mUnit));
+    QSharedPointer<VContainer> data = QSharedPointer<VContainer>(new VContainer(nullptr, &mUnit,
+                                                                                VContainer::UniqueNamespace()));
 
     QSharedPointer<VMeasurements> m =
             QSharedPointer<VMeasurements>(new VMeasurements(mUnit, data.data()));
@@ -140,14 +140,13 @@ void TST_VMeasurements::ValidPMCodesMultisizeFile()
     const int height = 176;
     const int size = 50;
 
-    QSharedPointer<VContainer> data = QSharedPointer<VContainer>(new VContainer(nullptr, &mUnit));
-    VContainer::SetHeight(height);
-    VContainer::SetSize(size);
+    QSharedPointer<VContainer> data = QSharedPointer<VContainer>(new VContainer(nullptr, &mUnit,
+                                                                                VContainer::UniqueNamespace()));
+    data->SetHeight(height);
+    data->SetSize(size);
 
     QSharedPointer<VMeasurements> m =
             QSharedPointer<VMeasurements>(new VMeasurements(mUnit, size, height, data.data()));
-    m->SetSize(VContainer::rsize());
-    m->SetHeight(VContainer::rheight());
 
     const QStringList listSystems = ListPMSystems();
     for (int i = 0; i < listSystems.size(); ++i)
@@ -195,7 +194,8 @@ void TST_VMeasurements::ValidPMCodesIndividualFile()
 {
     Unit mUnit = Unit::Cm;
 
-    QSharedPointer<VContainer> data = QSharedPointer<VContainer>(new VContainer(nullptr, &mUnit));
+    QSharedPointer<VContainer> data = QSharedPointer<VContainer>(new VContainer(nullptr, &mUnit,
+                                                                                VContainer::UniqueNamespace()));
 
     QSharedPointer<VMeasurements> m =
             QSharedPointer<VMeasurements>(new VMeasurements(mUnit, data.data()));
diff --git a/src/test/ValentinaTest/tst_vpiece.cpp b/src/test/ValentinaTest/tst_vpiece.cpp
index acb1d3257..e88f393b5 100644
--- a/src/test/ValentinaTest/tst_vpiece.cpp
+++ b/src/test/ValentinaTest/tst_vpiece.cpp
@@ -49,7 +49,7 @@ void TST_VPiece::ClearLoop()
     // See file <root>/src/app/share/collection/jacketМ6_30-110.val
     // Check correct seam allowance
     const Unit unit = Unit::Mm;
-    QScopedPointer<VContainer> data(new VContainer(nullptr, &unit));
+    QScopedPointer<VContainer> data(new VContainer(nullptr, &unit, VContainer::UniqueNamespace()));
     qApp->setPatternUnit(unit);
 
     data->UpdateGObject(304, new VPointF(61.866708661417327, 446.92270866141735, "Ф1", 5.0000125984251973,
@@ -221,7 +221,7 @@ void TST_VPiece::Issue620()
     // See file <root>/src/app/share/collection/bugs/Issue_#620.vit
     // Check main path
     const Unit unit = Unit::Cm;
-    QScopedPointer<VContainer> data(new VContainer(nullptr, &unit));
+    QScopedPointer<VContainer> data(new VContainer(nullptr, &unit, VContainer::UniqueNamespace()));
     qApp->setPatternUnit(unit);
 
     data->UpdateGObject(1, new VPointF(30, 39.999874015748034, "A", 5.0000125984251973, 9.9999874015748045));