Index: Ringtoets/GrassCoverErosionInwards/src/Ringtoets.GrassCoverErosionInwards.Plugin/GrassCoverErosionInwardsGuiPlugin.cs
===================================================================
diff -u -rba310454172ed29499474b2f8b013fa0f0c523b8 -r009444e57fa99bf5e3584a5bb86b6c314d46f3ff
--- Ringtoets/GrassCoverErosionInwards/src/Ringtoets.GrassCoverErosionInwards.Plugin/GrassCoverErosionInwardsGuiPlugin.cs	(.../GrassCoverErosionInwardsGuiPlugin.cs)	(revision ba310454172ed29499474b2f8b013fa0f0c523b8)
+++ Ringtoets/GrassCoverErosionInwards/src/Ringtoets.GrassCoverErosionInwards.Plugin/GrassCoverErosionInwardsGuiPlugin.cs	(.../GrassCoverErosionInwardsGuiPlugin.cs)	(revision 009444e57fa99bf5e3584a5bb86b6c314d46f3ff)
@@ -82,7 +82,7 @@
                 GrassCoverErosionInwardsFormsResources.CalculationIcon,
                 CalculationContextChildNodeObjects,
                 CalculationContextContextmenuStrip,
-                null);
+                CalculationContextOnNodeRemoved);
 
             yield return new TreeNodeInfo<GrassCoverErosionInwardsInputContext>
             {
@@ -433,6 +433,16 @@
             ActivityProgressDialogRunner.Run(Gui.MainWindow, activity);
         }
 
+        private void CalculationContextOnNodeRemoved(GrassCoverErosionInwardsCalculationContext calculationScenarioContext, object parentNodeData)
+        {
+            var calculationGroupContext = parentNodeData as GrassCoverErosionInwardsCalculationGroupContext;
+            if (calculationGroupContext != null)
+            {
+                calculationGroupContext.WrappedData.Children.Remove(calculationScenarioContext.WrappedData);
+                calculationGroupContext.NotifyObservers();
+            }
+        }
+
         #endregion
     }
 }
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