From 24bd7e26ba9b75400e8ac4420e991c02fc34a099 Mon Sep 17 00:00:00 2001
From: nds <nds@opencascade.com>
Date: Fri, 24 Jun 2016 17:42:34 +0300
Subject: [PATCH] Issue #1598 strange planes in GEOM after Export to GEOM

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

diff --git a/src/XGUI/XGUI_Displayer.cpp b/src/XGUI/XGUI_Displayer.cpp
index af9100af9..b9105ef92 100644
--- a/src/XGUI/XGUI_Displayer.cpp
+++ b/src/XGUI/XGUI_Displayer.cpp
@@ -907,7 +907,7 @@ void XGUI_Displayer::activateAIS(const Handle(AIS_InteractiveObject)& theIO,
                                  const int theMode, const bool theUpdateViewer) const
 {
   Handle(AIS_InteractiveContext) aContext = myWorkshop->viewer()->AISContext();
-  if (theIO == getTrihedron()) {
+  if (!theIO.IsNull() && theIO == getTrihedron()) {
     if (theMode != AIS_Shape::SelectionType(TopAbs_EDGE) &&
         theMode != AIS_Shape::SelectionType(TopAbs_VERTEX))
       return;
-- 
2.39.2