Index: Ringtoets/MacroStabilityInwards/src/Ringtoets.MacroStabilityInwards.Forms/Views/PipingScenariosView.cs
===================================================================
diff -u -r4bd71eca0b6db2959ccb01d6504d1bf5058603bd -r0bd99fbcdd44bb84757a0270af6f5085dbd76648
--- Ringtoets/MacroStabilityInwards/src/Ringtoets.MacroStabilityInwards.Forms/Views/PipingScenariosView.cs	(.../PipingScenariosView.cs)	(revision 4bd71eca0b6db2959ccb01d6504d1bf5058603bd)
+++ Ringtoets/MacroStabilityInwards/src/Ringtoets.MacroStabilityInwards.Forms/Views/PipingScenariosView.cs	(.../PipingScenariosView.cs)	(revision 0bd99fbcdd44bb84757a0270af6f5085dbd76648)
@@ -38,7 +38,7 @@
     /// </summary>
     public partial class PipingScenariosView : UserControl, IView
     {
-        private readonly RecursiveObserver<CalculationGroup, PipingInput> pipingInputObserver;
+        private readonly RecursiveObserver<CalculationGroup, MacroStabilityInwardsInput> pipingInputObserver;
         private readonly RecursiveObserver<CalculationGroup, CalculationGroup> pipingCalculationGroupObserver;
         private readonly RecursiveObserver<CalculationGroup, PipingCalculationScenario> pipingCalculationObserver;
         private readonly Observer pipingFailureMechanismObserver;
@@ -57,7 +57,7 @@
             pipingFailureMechanismObserver = new Observer(OnPipingFailureMechanismUpdate);
 
             // The concat is needed to observe the input of calculations in child groups.
-            pipingInputObserver = new RecursiveObserver<CalculationGroup, PipingInput>(UpdateDataGridViewDataSource, pcg => pcg.Children.Concat<object>(pcg.Children.OfType<PipingCalculationScenario>().Select(pc => pc.InputParameters)));
+            pipingInputObserver = new RecursiveObserver<CalculationGroup, MacroStabilityInwardsInput>(UpdateDataGridViewDataSource, pcg => pcg.Children.Concat<object>(pcg.Children.OfType<PipingCalculationScenario>().Select(pc => pc.InputParameters)));
             pipingCalculationGroupObserver = new RecursiveObserver<CalculationGroup, CalculationGroup>(UpdateDataGridViewDataSource, pcg => pcg.Children);
             pipingCalculationObserver = new RecursiveObserver<CalculationGroup, PipingCalculationScenario>(dataGridViewControl.RefreshDataGridView, pcg => pcg.Children);
         }