diff --git a/MatterControl.MeshOperations/MatterControl.MeshOperations.csproj b/MatterControl.MeshOperations/MatterControl.MeshOperations.csproj
index b2307c2f5..2a52fe411 100644
--- a/MatterControl.MeshOperations/MatterControl.MeshOperations.csproj
+++ b/MatterControl.MeshOperations/MatterControl.MeshOperations.csproj
@@ -11,9 +11,9 @@
     <ProjectReference Include="..\Submodules\agg-sharp\agg\Agg.csproj">
     </ProjectReference>
     <ProjectReference Include="..\Submodules\agg-sharp\DataConverters3D\DataConverters3D.csproj" />
+    <ProjectReference Include="..\Submodules\agg-sharp\geometry3Sharp\geometry3Sharp.csproj" />
     <ProjectReference Include="..\Submodules\agg-sharp\VectorMath\VectorMath.csproj">
     </ProjectReference>
-    <ProjectReference Include="..\Submodules\geometry3Sharp\geometry3Sharp.csproj" />
   </ItemGroup>
 
   <ItemGroup>
diff --git a/MatterControl.Printing/GCode/GCodeMemoryFile.cs b/MatterControl.Printing/GCode/GCodeMemoryFile.cs
index eba09082d..85b33357f 100644
--- a/MatterControl.Printing/GCode/GCodeMemoryFile.cs
+++ b/MatterControl.Printing/GCode/GCodeMemoryFile.cs
@@ -322,6 +322,7 @@ namespace MatterControl.Printing
 			{
 				layerIndex--;
 				while (layerIndex >= 0
+					&& layerIndex < layerHeights.Count
 					&& layerHeight < .01)
 				{
 					// walk back to find a layer height that seems like it might be right
diff --git a/MatterControlLib/Library/ContentProviders/GCodeContentProvider.cs b/MatterControlLib/Library/ContentProviders/GCodeContentProvider.cs
index e5ce4e82a..edcaf9d17 100644
--- a/MatterControlLib/Library/ContentProviders/GCodeContentProvider.cs
+++ b/MatterControlLib/Library/ContentProviders/GCodeContentProvider.cs
@@ -66,7 +66,7 @@ namespace MatterHackers.MatterControl
 
 		public Task<IObject3D> CreateItem(ILibraryItem item, Action<double, string> reporter)
 		{
-			System.Diagnostics.Debugger.Break();
+			// System.Diagnostics.Debugger.Break();
 			return null;
 		}