Index: src/Plugins/Wti/Wti.Controller/PipingContextMenuStrip.cs
===================================================================
diff -u -re61dfe357a722430029affaa9a28e6bd2cbbc281 -r4eeb65b4d7a03f5151011baaa5bf461ee08baf63
--- src/Plugins/Wti/Wti.Controller/PipingContextMenuStrip.cs	(.../PipingContextMenuStrip.cs)	(revision e61dfe357a722430029affaa9a28e6bd2cbbc281)
+++ src/Plugins/Wti/Wti.Controller/PipingContextMenuStrip.cs	(.../PipingContextMenuStrip.cs)	(revision 4eeb65b4d7a03f5151011baaa5bf461ee08baf63)
@@ -14,7 +14,7 @@
         public PipingContextMenuStrip(PipingData pipingData)
         {
             this.pipingData = pipingData;
-            var calculateItem = new ToolStripButton(Resources.PipingDataContextMenuCalculate);
+            var calculateItem = new ToolStripMenuItem(Resources.PipingDataContextMenuCalculate);
             calculateItem.Click += CalculateItemClick;
             Items.Add(calculateItem);
         }
Index: src/Plugins/Wti/Wti.Controller/PipingDataNodeController.cs
===================================================================
diff -u -re61dfe357a722430029affaa9a28e6bd2cbbc281 -r4eeb65b4d7a03f5151011baaa5bf461ee08baf63
--- src/Plugins/Wti/Wti.Controller/PipingDataNodeController.cs	(.../PipingDataNodeController.cs)	(revision e61dfe357a722430029affaa9a28e6bd2cbbc281)
+++ src/Plugins/Wti/Wti.Controller/PipingDataNodeController.cs	(.../PipingDataNodeController.cs)	(revision 4eeb65b4d7a03f5151011baaa5bf461ee08baf63)
@@ -76,7 +76,7 @@
             }
             catch (PipingCalculationException e)
             {
-                logger.Warn(String.Format(Resources.ErrorInPipingCalculation_0, e));
+                logger.Warn(String.Format(Resources.ErrorInPipingCalculation_0, e.Message));
             }
         }
     }
Index: src/Plugins/Wti/Wti.Forms/Wti.Forms.csproj
===================================================================
diff -u -r91692bb0416bdff85f51b10a3c151d67721d9319 -r4eeb65b4d7a03f5151011baaa5bf461ee08baf63
--- src/Plugins/Wti/Wti.Forms/Wti.Forms.csproj	(.../Wti.Forms.csproj)	(revision 91692bb0416bdff85f51b10a3c151d67721d9319)
+++ src/Plugins/Wti/Wti.Forms/Wti.Forms.csproj	(.../Wti.Forms.csproj)	(revision 4eeb65b4d7a03f5151011baaa5bf461ee08baf63)
@@ -118,6 +118,7 @@
     <EmbeddedResource Include="Properties\Resources.resx">
       <Generator>PublicResXFileCodeGenerator</Generator>
       <LastGenOutput>Resources.Designer.cs</LastGenOutput>
+      <SubType>Designer</SubType>
     </EmbeddedResource>
   </ItemGroup>
   <ItemGroup>