From 0f199064f3257a8717bc368c104702ee7d30b372 Mon Sep 17 00:00:00 2001
From: wmayer <wmayer@users.sourceforge.net>
Date: Tue, 20 Jun 2017 12:16:05 +0200
Subject: [PATCH] only change view provider stuff when GUI is up

---
 src/Mod/Path/PathScripts/PathContour.py | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/Mod/Path/PathScripts/PathContour.py b/src/Mod/Path/PathScripts/PathContour.py
index 8c201a00dd..636cde320a 100644
--- a/src/Mod/Path/PathScripts/PathContour.py
+++ b/src/Mod/Path/PathScripts/PathContour.py
@@ -267,7 +267,8 @@ class ObjectContour:
 
         path = Path.Path(commandlist)
         obj.Path = path
-        obj.ViewObject.Visibility = True
+        if  obj.ViewObject:
+            obj.ViewObject.Visibility = True
 
 
 class _ViewProviderContour: