Index: Ringtoets/HeightStructures/src/Ringtoets.HeightStructures.Service/HeightStructuresCalculationActivity.cs
===================================================================
diff -u -rf71fb2faaae836236b85a1c3a4483f6aee4f4d88 -rcdc1bc16334dad7a675276648c42ac6fab5ffdfb
--- Ringtoets/HeightStructures/src/Ringtoets.HeightStructures.Service/HeightStructuresCalculationActivity.cs	(.../HeightStructuresCalculationActivity.cs)	(revision f71fb2faaae836236b85a1c3a4483f6aee4f4d88)
+++ Ringtoets/HeightStructures/src/Ringtoets.HeightStructures.Service/HeightStructuresCalculationActivity.cs	(.../HeightStructuresCalculationActivity.cs)	(revision cdc1bc16334dad7a675276648c42ac6fab5ffdfb)
@@ -22,6 +22,7 @@
 using System;
 using Core.Common.Base.Service;
 using Ringtoets.Common.Data.AssessmentSection;
+using Ringtoets.Common.Data.Hydraulics;
 using Ringtoets.Common.Data.Structures;
 using Ringtoets.HeightStructures.Data;
 using Ringtoets.HydraRing.Calculation.Activities;
@@ -92,7 +93,8 @@
                                          failureMechanism.GeneralInput.N,
                                          assessmentSection.FailureMechanismContribution.Norm,
                                          failureMechanism.Contribution,
-                                         hydraulicBoundaryDatabaseFilePath);
+                                         hydraulicBoundaryDatabaseFilePath,
+                                         assessmentSection.HydraulicBoundaryDatabase.EffectivePreprocessorDirectory());
         }
 
         protected override void OnCancel()