diff --git a/src/app/dialogs/app/dialogstandardmeasurements.cpp b/src/app/dialogs/app/dialogstandardmeasurements.cpp
index fb0385b24..e6701d4b5 100644
--- a/src/app/dialogs/app/dialogstandardmeasurements.cpp
+++ b/src/app/dialogs/app/dialogstandardmeasurements.cpp
@@ -34,6 +34,9 @@
 #include "../../xml/vstandardmeasurements.h"
 #include "../../core/vapplication.h"
 #include "../../container/vcontainer.h"
+#include <QLoggingCategory>
+
+Q_LOGGING_CATEGORY(vStMeasur, "v.st.measurements")
 
 //---------------------------------------------------------------------------------------------------------------------
 DialogStandardMeasurements::DialogStandardMeasurements(VContainer *data, const QString &patternPieceName,
@@ -57,6 +60,7 @@ DialogStandardMeasurements::DialogStandardMeasurements(VContainer *data, const Q
         connect(bCansel, &QPushButton::clicked, this, &DialogStandardMeasurements::DialogRejected);
     }
 
+    qCDebug(vStMeasur)<<"Pattern piece name"<<_name;
     ui->lineEditName->setText(_name);
 
     LoadStandardTables();
@@ -143,6 +147,7 @@ void DialogStandardMeasurements::CheckState()
 //---------------------------------------------------------------------------------------------------------------------
 void DialogStandardMeasurements::LoadStandardTables()
 {
+    qCDebug(vStMeasur)<<"Loading standard table.";
     QStringList filters{"*.vst"};
     QDir tablesDir(qApp->pathToTables());
     tablesDir.setNameFilters(filters);
@@ -151,11 +156,13 @@ void DialogStandardMeasurements::LoadStandardTables()
     const QStringList allFiles = tablesDir.entryList(QDir::NoDotAndDotDot | QDir::Files);
     if (allFiles.isEmpty() == true)
     {
+        qCDebug(vStMeasur)<<"Can't find standard measurements in path"<<qApp->pathToTables();
         ui->comboBoxTables->clear();
         CheckState();
         return;
     }
 
+    qCDebug(vStMeasur)<<"Was found"<<allFiles.size()<<"tables.";
     for (int i = 0; i < allFiles.size(); ++i)
     {
         QFileInfo fi(allFiles.at(i));
@@ -166,24 +173,27 @@ void DialogStandardMeasurements::LoadStandardTables()
             m.setContent(fi.absoluteFilePath());
             if (m.MUnit() == Unit::Inch)
             {
-                qWarning()<<"We do not support inches for standard table. Ignore table"<<fi.absoluteFilePath()<<".";
+                qCWarning(vStMeasur)<<"We do not support inches for standard table. Ignore table"
+                                    <<fi.absoluteFilePath()<<".";
             }
             else
             {
                 const QString trDesc = qApp->STDescription(m.Id());
                 if (trDesc.isEmpty() == false)
                 {
+                    qCDebug(vStMeasur)<<"Adding user table from"<<fi.absoluteFilePath();
                     ui->comboBoxTables->addItem(trDesc, QVariant(fi.absoluteFilePath()));
                 }
                 else if (m.Description().isEmpty() == false)
                 {
+                    qCDebug(vStMeasur)<<"Adding table with id"<<m.Id()<<"from"<<fi.absoluteFilePath();
                     ui->comboBoxTables->addItem(m.Description(), QVariant(fi.absoluteFilePath()));
                 }
             }
         }
         catch (VException &e)
         {
-            qDebug()<<"File error."<<e.ErrorMessage()<<e.DetailedInformation()<<Q_FUNC_INFO;
+            qCDebug(vStMeasur)<<"File error."<<e.ErrorMessage()<<e.DetailedInformation()<<Q_FUNC_INFO;
             continue;
         }
     }
diff --git a/src/app/mainwindow.cpp b/src/app/mainwindow.cpp
index 070c0fcae..5b87a3d00 100644
--- a/src/app/mainwindow.cpp
+++ b/src/app/mainwindow.cpp
@@ -140,23 +140,30 @@ MainWindow::MainWindow(QWidget *parent)
  */
 void MainWindow::ActionNewPP()
 {
+    qCDebug(vMainWindow)<<"New PP.";
     QString patternPieceName = QString(tr("Pattern piece %1")).arg(comboBoxDraws->count()+1);
+    qCDebug(vMainWindow)<<"Generated PP name:"<<patternPieceName;
     QString path;
     if (comboBoxDraws->count() == 0)
     {
+        qCDebug(vMainWindow)<<"First PP";
         DialogMeasurements measurements(this);
         if (measurements.exec() == QDialog::Rejected)
         {
+            qCDebug(vMainWindow)<<"Creation PP was canceled";
             return;
         }
         if (measurements.type() == MeasurementsType::Standard)
         {
+            qCDebug(vMainWindow)<<"PP with standard measurements";
             qApp->setPatternType(MeasurementsType::Standard);
             DialogStandardMeasurements stMeasurements(pattern, patternPieceName, this);
             if (stMeasurements.exec() == QDialog::Accepted)
             {
                 patternPieceName = stMeasurements.name();
+                qCDebug(vMainWindow)<<"PP name:"<<patternPieceName;
                 path = stMeasurements.tablePath();
+                qCDebug(vMainWindow)<<"Table path:"<<path;
                 VStandardMeasurements m(pattern);
                 m.setContent(path);
                 m.SetSize();
@@ -165,11 +172,13 @@ void MainWindow::ActionNewPP()
             }
             else
             {
+                qCDebug(vMainWindow)<<"Selection standard measurements canceled.";
                 return;
             }
         }
         else
         {
+            qCDebug(vMainWindow)<<"PP with individual measurements.";
             QMessageBox::StandardButton ret;
             ret = QMessageBox::question(this, tr("Individual measurements is under development"),
                                         tr("There is no way create individual measurements file independent on the "
@@ -186,13 +195,16 @@ void MainWindow::ActionNewPP()
             if (indMeasurements.exec() == QDialog::Accepted)
             {
                 patternPieceName = indMeasurements.name();
+                qCDebug(vMainWindow)<<"PP name:"<<patternPieceName;
                 path = indMeasurements.tablePath();
+                qCDebug(vMainWindow)<<"Table path:"<<path;
                 VIndividualMeasurements m(pattern);
                 m.setContent(path);
                 m.Measurements();
             }
             else
             {
+                qCDebug(vMainWindow)<<"Selection individual measurements canceled.";
                 return;
             }
         }
@@ -204,16 +216,19 @@ void MainWindow::ActionNewPP()
     }
     else
     {
+        qCDebug(vMainWindow)<<"PP count"<<comboBoxDraws->count();
         patternPieceName = PatternPieceName(patternPieceName);
+        qCDebug(vMainWindow)<<"PP name:"<<patternPieceName;
         if (patternPieceName.isEmpty())
         {
+            qCDebug(vMainWindow)<<"Name empty.";
             return;
         }
         path = doc->MPath();
     }
     if (doc->appendPP(patternPieceName) == false)
     {
-        qDebug()<<"Error creating pattern piece with the name "<<patternPieceName<<".";
+        qCDebug(vMainWindow)<<"Error creating pattern piece with the name "<<patternPieceName<<".";
         return;
     }
     comboBoxDraws->blockSignals(true);
diff --git a/src/app/xml/vdomdocument.cpp b/src/app/xml/vdomdocument.cpp
index 1dce30c7d..56ecdcc94 100644
--- a/src/app/xml/vdomdocument.cpp
+++ b/src/app/xml/vdomdocument.cpp
@@ -375,7 +375,14 @@ void VDomDocument::ValidateXML(const QString &schema, const QString &fileName)
     MessageHandler messageHandler;
     QXmlSchema sch;
     sch.setMessageHandler(&messageHandler);
-    sch.load(&fileSchema, QUrl::fromLocalFile(fileSchema.fileName()));
+    if (sch.load(&fileSchema, QUrl::fromLocalFile(fileSchema.fileName()))==false)
+    {
+        pattern.close();
+        fileSchema.close();
+        const QString errorMsg(tr("Could not load schema file.").arg(fileSchema.fileName()));
+        throw VException(errorMsg);
+    }
+    qCDebug(vXML)<<"Schema loaded.";
 
     bool errorOccurred = false;
     if (sch.isValid() == false)
diff --git a/src/app/xml/vpattern.cpp b/src/app/xml/vpattern.cpp
index f599ef77e..239b2709f 100644
--- a/src/app/xml/vpattern.cpp
+++ b/src/app/xml/vpattern.cpp
@@ -2463,13 +2463,16 @@ QString VPattern::GenerateLabel(const LabelType &type) const
             }
             ++i;
         }
+        qCDebug(vXML)<<"Point label:"<<name;
         return name;
     }
     else if (type == LabelType::NewLabel)
     {
         if (drawList.isEmpty())
         {
-            return GetLabelBase(0);
+            const QString label = GetLabelBase(0);
+            qCDebug(vXML)<<"Point label:"<<label;
+            return label;
         }
 
         int index = 0;
@@ -2496,8 +2499,10 @@ QString VPattern::GenerateLabel(const LabelType &type) const
                 break;
             }
         } while (data->IsUnique(name) == false);
+        qCDebug(vXML)<<"Point label:"<<name;
         return name;
     }
+    qCDebug(vXML)<<"Got unknow type"<<static_cast<char>(type);
     return QString();
 }