diff --git a/src/app/valentina/xml/vpattern.cpp b/src/app/valentina/xml/vpattern.cpp
index 808c2b268..c75fbd324 100644
--- a/src/app/valentina/xml/vpattern.cpp
+++ b/src/app/valentina/xml/vpattern.cpp
@@ -331,6 +331,7 @@ VContainer VPattern::GetCompleteData() const
     }
 
     const VDataTool *vTool = tools.value(id);
+    SCASSERT(vTool != nullptr)
     VContainer lastData = vTool->getData();
     //Delete special variables if exist
     lastData.RemoveVariable(currentLength);