From b2104e97e175e841fedc8eb15219f20c856d7367 Mon Sep 17 00:00:00 2001
From: blobfish <blobfish@gmx.com>
Date: Sun, 3 May 2015 12:50:29 -0400
Subject: [PATCH] Gui: View3DInventorViewer: check if child exists before
 removal

---
 src/Gui/View3DInventorViewer.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/Gui/View3DInventorViewer.cpp b/src/Gui/View3DInventorViewer.cpp
index 4e05bba9a..a6299168c 100644
--- a/src/Gui/View3DInventorViewer.cpp
+++ b/src/Gui/View3DInventorViewer.cpp
@@ -626,7 +626,7 @@ void View3DInventorViewer::removeViewProvider(ViewProvider* pcProvider)
 
     SoSeparator* root = pcProvider->getRoot();
 
-    if (root) {
+    if (root && (pcViewProviderRoot->findChild(root) != -1)) {
         pcViewProviderRoot->removeChild(root);
         _ViewProviderMap.erase(root);
     }