Index: Riskeer/Piping/src/Riskeer.Piping.Plugin/PipingPlugin.cs
===================================================================
diff -u -r81be338174a6e1ec2da201a50c8e1ff7d3cb0a24 -r5fd9d01d1ab8bbc4f1f447ecd64f9152baa164d8
--- Riskeer/Piping/src/Riskeer.Piping.Plugin/PipingPlugin.cs	(.../PipingPlugin.cs)	(revision 81be338174a6e1ec2da201a50c8e1ff7d3cb0a24)
+++ Riskeer/Piping/src/Riskeer.Piping.Plugin/PipingPlugin.cs	(.../PipingPlugin.cs)	(revision 5fd9d01d1ab8bbc4f1f447ecd64f9152baa164d8)
@@ -543,14 +543,16 @@
 
         private static bool ClosePipingInputViewForData(PipingInputView view, object o)
         {
-            switch (o)
+            if (o is ProbabilisticPipingCalculationContext probabilisticPipingCalculationScenarioContext)
             {
-                case ProbabilisticPipingCalculationContext probabilisticPipingCalculationScenarioContext:
-                    return ReferenceEquals(view.Data, probabilisticPipingCalculationScenarioContext.WrappedData);
-                case SemiProbabilisticPipingCalculationScenarioContext semiProbabilisticPipingCalculationScenarioContext:
-                    return ReferenceEquals(view.Data, semiProbabilisticPipingCalculationScenarioContext.WrappedData);
+                return ReferenceEquals(view.Data, probabilisticPipingCalculationScenarioContext.WrappedData);
             }
 
+            if (o is SemiProbabilisticPipingCalculationScenarioContext semiProbabilisticPipingCalculationScenarioContext)
+            {
+                return ReferenceEquals(view.Data, semiProbabilisticPipingCalculationScenarioContext.WrappedData);
+            }
+
             IEnumerable<IPipingCalculation<PipingInput>> calculations = null;
 
             if (o is PipingCalculationGroupContext pipingCalculationGroupContext)