From c6e707147fe7b4c157ee4ecd987b83a1f7b53c39 Mon Sep 17 00:00:00 2001
From: dpasukhi <dpasukhi@opencascade.com>
Date: Mon, 29 Nov 2021 11:36:21 +0300
Subject: [PATCH] 0031786: Data Exchange - After the importing STEP file the
 free shape is empty

Fixed throwing an exception when the relation to read views is incorrect
---
 src/STEPCAFControl/STEPCAFControl_Reader.cxx | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/src/STEPCAFControl/STEPCAFControl_Reader.cxx b/src/STEPCAFControl/STEPCAFControl_Reader.cxx
index 49c0472ba6..d08ff63f1a 100644
--- a/src/STEPCAFControl/STEPCAFControl_Reader.cxx
+++ b/src/STEPCAFControl/STEPCAFControl_Reader.cxx
@@ -4293,8 +4293,10 @@ Standard_Boolean STEPCAFControl_Reader::ReadViews(const Handle(XSControl_WorkSes
     for (; anIter.More(); anIter.Next()) {
       if (anIter.Value()->IsKind(STANDARD_TYPE(StepRepr_MappedItem))) {
         Handle(StepRepr_MappedItem) anItem = Handle(StepRepr_MappedItem)::DownCast(anIter.Value());
-        Handle(StepRepr_Representation) aRepr = anItem->MappingSource()->MappedRepresentation();
-        collectViewShapes(theWS, theDoc, aRepr, aShapes);
+        if (Handle(StepRepr_Representation) aRepr = anItem->MappingSource()->MappedRepresentation())
+        {
+          collectViewShapes(theWS, theDoc, aRepr, aShapes);
+        }
       }
       else if (anIter.Value()->IsKind(STANDARD_TYPE(StepVisual_AnnotationOccurrence)) ||
         anIter.Value()->IsKind(STANDARD_TYPE(StepVisual_DraughtingCallout))) {