From f59173c7289e9d8adf913444cf21a5d204763c7e Mon Sep 17 00:00:00 2001
From: WandererFan <wandererfan@gmail.com>
Date: Tue, 31 May 2016 20:34:48 -0400
Subject: [PATCH] Fix load Dimension w/ broken ref

---
 src/Mod/TechDraw/App/DrawViewDimension.cpp | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/Mod/TechDraw/App/DrawViewDimension.cpp b/src/Mod/TechDraw/App/DrawViewDimension.cpp
index a33abaa22..da4f661ce 100644
--- a/src/Mod/TechDraw/App/DrawViewDimension.cpp
+++ b/src/Mod/TechDraw/App/DrawViewDimension.cpp
@@ -149,7 +149,9 @@ void DrawViewDimension::onChanged(const App::Property* prop)
         }
         if (prop == &References3D) {                                       //have to rebuild the Measurement object
             clear3DMeasurements();
-            set3DMeasurement(References3D.getValues().at(0),References3D.getSubValues());
+            if (!(References3D.getValues()).empty()) {
+                set3DMeasurement(References3D.getValues().at(0),References3D.getSubValues());
+            }
         }
 
     DrawView::onChanged(prop);