From 161d5888fd3c2748900c8fe047ef14b2bdf4afdd Mon Sep 17 00:00:00 2001
From: nds <natalia.donis@opencascade.com>
Date: Mon, 2 Mar 2015 14:12:16 +0300
Subject: [PATCH] Do not start create operation if the feature is not created.

---
 src/ModuleBase/ModuleBase_Operation.cpp | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/src/ModuleBase/ModuleBase_Operation.cpp b/src/ModuleBase/ModuleBase_Operation.cpp
index de9a9e857..f1a0ec715 100644
--- a/src/ModuleBase/ModuleBase_Operation.cpp
+++ b/src/ModuleBase/ModuleBase_Operation.cpp
@@ -148,8 +148,14 @@ void ModuleBase_Operation::start()
 {
   ModelAPI_Session::get()->startOperation();
 
-  if (!myIsEditing)
-    createFeature();
+  if (!myIsEditing) {
+    FeaturePtr aFeature = createFeature();
+    // if the feature is not created, there is no sense to start the operation
+    if (aFeature.get() == NULL) {
+      ModelAPI_Session::get()->abortOperation();
+      return;
+    }
+  }
 
   startOperation();
   emit started();
-- 
2.39.2