Index: src/Plugins/Wti/Wti.Forms/NodePresenters/PipingDataNodePresenter.cs
===================================================================
diff -u -r49b7320ad56bfa60788e8792b79dd537318f68ff -r335a4e23bb561e53214954d40f79eca9a654ce99
--- src/Plugins/Wti/Wti.Forms/NodePresenters/PipingDataNodePresenter.cs	(.../PipingDataNodePresenter.cs)	(revision 49b7320ad56bfa60788e8792b79dd537318f68ff)
+++ src/Plugins/Wti/Wti.Forms/NodePresenters/PipingDataNodePresenter.cs	(.../PipingDataNodePresenter.cs)	(revision 335a4e23bb561e53214954d40f79eca9a654ce99)
@@ -100,6 +100,7 @@
             var failureMechanism = (PipingFailureMechanism) parentNodeData;
 
             failureMechanism.PipingData = null;
+            failureMechanism.NotifyObservers();
             return true;
         }
 
Index: src/Plugins/Wti/Wti.Forms/Wti.Forms.csproj
===================================================================
diff -u -rbb61ed227cf79e994b84019096e4297b2fbd4527 -r335a4e23bb561e53214954d40f79eca9a654ce99
--- src/Plugins/Wti/Wti.Forms/Wti.Forms.csproj	(.../Wti.Forms.csproj)	(revision bb61ed227cf79e994b84019096e4297b2fbd4527)
+++ src/Plugins/Wti/Wti.Forms/Wti.Forms.csproj	(.../Wti.Forms.csproj)	(revision 335a4e23bb561e53214954d40f79eca9a654ce99)
@@ -108,9 +108,6 @@
     </ProjectReference>
   </ItemGroup>
   <ItemGroup>
-    <EmbeddedResource Include="NodePresenters\PipingContextMenuStrip.resx">
-      <DependentUpon>PipingContextMenuStrip.cs</DependentUpon>
-    </EmbeddedResource>
     <EmbeddedResource Include="Properties\Resources.resx">
       <Generator>PublicResXFileCodeGenerator</Generator>
       <LastGenOutput>Resources.Designer.cs</LastGenOutput>