Index: Ringtoets/StabilityStoneCover/src/Ringtoets.StabilityStoneCover.Plugin/StabilityStoneCoverPlugin.cs
===================================================================
diff -u -r0f6049b15bcadf8de3a59c74e829f27bb725c013 -r7da3e50da60f27ba27ec7c97c860d8c0b92eb313
--- Ringtoets/StabilityStoneCover/src/Ringtoets.StabilityStoneCover.Plugin/StabilityStoneCoverPlugin.cs	(.../StabilityStoneCoverPlugin.cs)	(revision 0f6049b15bcadf8de3a59c74e829f27bb725c013)
+++ Ringtoets/StabilityStoneCover/src/Ringtoets.StabilityStoneCover.Plugin/StabilityStoneCoverPlugin.cs	(.../StabilityStoneCoverPlugin.cs)	(revision 7da3e50da60f27ba27ec7c97c860d8c0b92eb313)
@@ -390,17 +390,18 @@
 
                 if (dialog.SelectedItems.Any())
                 {
-                    GenerateStabilityStoneCoverCalculations(nodeData.WrappedData, dialog.SelectedItems);
+                    GenerateStabilityStoneCoverCalculations(dialog.SelectedItems, nodeData.WrappedData.Children);
                     nodeData.NotifyObservers();
                 }
             }
         }
 
-        private static void GenerateStabilityStoneCoverCalculations(CalculationGroup target, IEnumerable<HydraulicBoundaryLocation> hydraulicBoundaryLocations)
+        private static void GenerateStabilityStoneCoverCalculations(IEnumerable<HydraulicBoundaryLocation> hydraulicBoundaryLocations,
+                                                                    IList<ICalculationBase> calculationCollection)
         {
             StabilityStoneCoverCalculationConfigurationHelper.AddCalculationsFromLocations(
                 hydraulicBoundaryLocations,
-                target.Children);
+                calculationCollection);
         }
 
         private void AddWaveConditionsCalculation(StabilityStoneCoverWaveConditionsCalculationGroupContext nodeData)