From dcb0b83441cfd09110d0efee7e00ec9154a5ce51 Mon Sep 17 00:00:00 2001
From: dmv <dmv@opencascade.com>
Date: Tue, 1 Jul 2008 13:26:51 +0000
Subject: [PATCH] Bug IPAL20033 Error after Close Study with Change Clipping
 dialog box opened. Sometimes it either crashes or hangs up.

---
 src/SMESHGUI/SMESHGUI_ClippingDlg.cxx | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/SMESHGUI/SMESHGUI_ClippingDlg.cxx b/src/SMESHGUI/SMESHGUI_ClippingDlg.cxx
index d8d9fd69d..b282d8703 100644
--- a/src/SMESHGUI/SMESHGUI_ClippingDlg.cxx
+++ b/src/SMESHGUI/SMESHGUI_ClippingDlg.cxx
@@ -382,7 +382,9 @@ SMESHGUI_ClippingDlg::~SMESHGUI_ClippingDlg()
 {
   // no need to delete child widgets, Qt does it all for us
   std::for_each(myPlanes.begin(),myPlanes.end(),TSetVisiblity(false));
-  SMESH::RenderViewWindow(SMESH::GetViewWindow(mySMESHGUI));
+
+  if (SVTK_ViewWindow* aViewWindow = SMESH::GetViewWindow(mySMESHGUI))
+    SMESH::RenderViewWindow(aViewWindow);
 }
 
 //=======================================================================