From a2b76ad7df0d65eb895238dfc8939494b3875968 Mon Sep 17 00:00:00 2001
From: azv <azv@opencascade.com>
Date: Thu, 23 Apr 2015 08:34:43 +0300
Subject: [PATCH] Issue #484: Fix the crash while making extrusion from python
 script

---
 src/SketchSolver/SketchSolver_Constraint.cpp | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/SketchSolver/SketchSolver_Constraint.cpp b/src/SketchSolver/SketchSolver_Constraint.cpp
index 4e815d649..ce0fc9797 100644
--- a/src/SketchSolver/SketchSolver_Constraint.cpp
+++ b/src/SketchSolver/SketchSolver_Constraint.cpp
@@ -333,8 +333,10 @@ Slvs_hEntity SketchSolver_Constraint::changeEntity(AttributeRefAttrPtr theAttrib
 Slvs_hEntity SketchSolver_Constraint::changeEntity(AttributePtr theEntity, int& theType)
 {
   Slvs_hEntity aResult = SLVS_E_UNKNOWN;
-  if (!theEntity || !isInitialized(theEntity))
+  if (!theEntity || !isInitialized(theEntity)) {
+    myErrorMsg = SketchSolver_Error::NOT_INITIALIZED();
     return SLVS_E_UNKNOWN;
+  }
 
   // If the entity is already in the group, try to find it
   std::map<std::shared_ptr<ModelAPI_Attribute>, Slvs_hEntity>::const_iterator anEntIter =
-- 
2.39.2