diff --git a/sc/source/core/data/documen5.cxx b/sc/source/core/data/documen5.cxx
index 4076b431ef7b..d89be232d223 100644
--- a/sc/source/core/data/documen5.cxx
+++ b/sc/source/core/data/documen5.cxx
@@ -688,6 +688,9 @@ std::vector<std::pair<uno::Reference<chart2::XChartDocument>, Rectangle> > ScDoc
                 continue;
 
             uno::Reference< chart2::XChartDocument > xChartDoc( ScChartHelper::GetChartFromSdrObject( pObject ) );
+            if(!xChartDoc.is())
+                continue;
+
             Rectangle aRect = pObject->GetLastBoundRect();
             aRet.push_back(std::pair<uno::Reference<chart2::XChartDocument>, Rectangle>(xChartDoc, aRect));
         }
diff --git a/sc/source/ui/view/tabvwsh4.cxx b/sc/source/ui/view/tabvwsh4.cxx
index 338405a43745..80b7e77347e5 100644
--- a/sc/source/ui/view/tabvwsh4.cxx
+++ b/sc/source/ui/view/tabvwsh4.cxx
@@ -581,7 +581,10 @@ void ScTabViewShell::AddOpenGLChartWindows()
     for(std::vector<std::pair<uno::Reference<chart2::XChartDocument>, Rectangle> >::iterator itr = aCharts.begin(),
             itrEnd = aCharts.end(); itr != itrEnd; ++itr)
     {
+        if(!itr->first.is())
+            return;
         OpenGLWindow* pOpenGLWindow = new OpenGLWindow(pParentWindow);
+
         pOpenGLWindow->Show(false);
         Size aSize = itr->second.GetSize();
         Size aWindowSize = pOpenGLWindow->LogicToPixel( aSize, MapMode( MAP_100TH_MM ) );