Index: Ringtoets/DuneErosion/src/Ringtoets.DuneErosion.Service/DuneLocationCalculationActivityFactory.cs
===================================================================
diff -u -r5ca2648fbf46c3960765d1919068bdb58ef5e145 -rfb1cce2b40ad9236ebff69f7cefd26d24d065d03
--- Ringtoets/DuneErosion/src/Ringtoets.DuneErosion.Service/DuneLocationCalculationActivityFactory.cs	(.../DuneLocationCalculationActivityFactory.cs)	(revision 5ca2648fbf46c3960765d1919068bdb58ef5e145)
+++ Ringtoets/DuneErosion/src/Ringtoets.DuneErosion.Service/DuneLocationCalculationActivityFactory.cs	(.../DuneLocationCalculationActivityFactory.cs)	(revision fb1cce2b40ad9236ebff69f7cefd26d24d065d03)
@@ -23,6 +23,7 @@
 using System.Collections.Generic;
 using System.Linq;
 using Ringtoets.Common.Data.AssessmentSection;
+using Ringtoets.Common.Data.Hydraulics;
 using Ringtoets.Common.Service;
 using Ringtoets.DuneErosion.Data;
 
@@ -64,7 +65,7 @@
 
             return calculations.Select(calculation => new DuneLocationCalculationActivity(calculation,
                                                                                           assessmentSection.HydraulicBoundaryDatabase.FilePath,
-                                                                                          assessmentSection.HydraulicBoundaryDatabase.PreprocessorDirectory,
+                                                                                          assessmentSection.HydraulicBoundaryDatabase.EffectivePreprocessorDirectory(),
                                                                                           norm,
                                                                                           messageProvider)).ToArray();
         }