From 9585dccdd4d56657ced8ef9b25797979ea237f76 Mon Sep 17 00:00:00 2001
From: mpv <mikhail.ponikarov@opencascade.com>
Date: Fri, 7 Nov 2014 11:08:04 +0300
Subject: [PATCH] Issue #244 : do not allow to select null objects (coming from
 other documents) yet

---
 src/Model/Model_AttributeRefAttr.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/Model/Model_AttributeRefAttr.cpp b/src/Model/Model_AttributeRefAttr.cpp
index 85446ef24..4e8a52b0e 100644
--- a/src/Model/Model_AttributeRefAttr.cpp
+++ b/src/Model/Model_AttributeRefAttr.cpp
@@ -39,7 +39,7 @@ boost::shared_ptr<ModelAPI_Attribute> Model_AttributeRefAttr::attr()
 
 void Model_AttributeRefAttr::setObject(ObjectPtr theObject)
 {
-  if (!myIsInitialized || myID->Get().Length() != 0 || object() != theObject) {
+  if (theObject && (!myIsInitialized || myID->Get().Length() != 0 || object() != theObject)) {
     boost::shared_ptr<Model_Data> aData = boost::dynamic_pointer_cast<Model_Data>(
         theObject->data());
     myRef->Set(aData->label().Father());
-- 
2.39.2