Index: Ringtoets/DuneErosion/src/Ringtoets.DuneErosion.Forms/GuiServices/DuneLocationCalculationGuiService.cs
===================================================================
diff -u -rf8c28b3b04cdabb62ea37772efcb1f4ebbbf2b9e -r76e7f2d96ecaa823b6ef4f63bd5faef63886a0d5
--- Ringtoets/DuneErosion/src/Ringtoets.DuneErosion.Forms/GuiServices/DuneLocationCalculationGuiService.cs	(.../DuneLocationCalculationGuiService.cs)	(revision f8c28b3b04cdabb62ea37772efcb1f4ebbbf2b9e)
+++ Ringtoets/DuneErosion/src/Ringtoets.DuneErosion.Forms/GuiServices/DuneLocationCalculationGuiService.cs	(.../DuneLocationCalculationGuiService.cs)	(revision 76e7f2d96ecaa823b6ef4f63bd5faef63886a0d5)
@@ -77,7 +77,8 @@
                 throw new ArgumentNullException(nameof(locations));
             }
 
-            string validationProblem = HydraulicBoundaryDatabaseHelper.ValidatePathForCalculation(hydraulicBoundaryDatabaseFilePath);
+            string validationProblem = HydraulicBoundaryDatabaseHelper.ValidatePathForCalculation(hydraulicBoundaryDatabaseFilePath,
+                                                                                                  preprocessorDirectory);
             if (!string.IsNullOrEmpty(validationProblem))
             {
                 log.ErrorFormat(RingtoetsCommonFormsResources.CalculateHydraulicBoundaryLocation_Start_calculation_failed_0_,