Index: Ringtoets/Piping/src/Ringtoets.Piping.Service/PipingDataSynchronizationService.cs
===================================================================
diff -u -rf1fa2338dda2747f6bb70e82b4527f7b5f1708bf -rb39d085012e7d50a761a38b485bf7c0e948ad7f4
--- Ringtoets/Piping/src/Ringtoets.Piping.Service/PipingDataSynchronizationService.cs	(.../PipingDataSynchronizationService.cs)	(revision f1fa2338dda2747f6bb70e82b4527f7b5f1708bf)
+++ Ringtoets/Piping/src/Ringtoets.Piping.Service/PipingDataSynchronizationService.cs	(.../PipingDataSynchronizationService.cs)	(revision b39d085012e7d50a761a38b485bf7c0e948ad7f4)
@@ -69,9 +69,9 @@
                 throw new ArgumentNullException("calculation");
             }
 
-            calculation.Output = null;
+            calculation.ClearOutput();
         }
-        
+
         /// <summary>
         /// Clears the <see cref="HydraulicBoundaryLocation"/> and output for all the calculations in the <see cref="PipingFailureMechanism"/>.
         /// </summary>