Index: Ringtoets/GrassCoverErosionInwards/src/Ringtoets.GrassCoverErosionInwards.Plugin/GrassCoverErosionInwardsGuiPlugin.cs
===================================================================
diff -u -rb47c41dd3741ada477388e6c8a9224ecb66291e7 -rc08ad497738463b62a3f8d719d5b4a7100d878ce
--- Ringtoets/GrassCoverErosionInwards/src/Ringtoets.GrassCoverErosionInwards.Plugin/GrassCoverErosionInwardsGuiPlugin.cs	(.../GrassCoverErosionInwardsGuiPlugin.cs)	(revision b47c41dd3741ada477388e6c8a9224ecb66291e7)
+++ Ringtoets/GrassCoverErosionInwards/src/Ringtoets.GrassCoverErosionInwards.Plugin/GrassCoverErosionInwardsGuiPlugin.cs	(.../GrassCoverErosionInwardsGuiPlugin.cs)	(revision c08ad497738463b62a3f8d719d5b4a7100d878ce)
@@ -23,6 +23,7 @@
 using System.Collections;
 using System.Collections.Generic;
 using System.Drawing;
+using System.IO;
 using System.Linq;
 using System.Windows.Forms;
 using Core.Common.Base.Data;
@@ -363,7 +364,7 @@
                     CreateHydraRingTargetProbabilityCalculationActivity(
                         context.FailureMechanism.Sections.First(), // TODO: Pass dike section based on cross section of calculation with reference line
                         calc.InputParameters.HydraulicBoundaryLocation,
-                        context.AssessmentSection.HydraulicBoundaryDatabase.FilePath,
+                        Path.GetDirectoryName(context.AssessmentSection.HydraulicBoundaryDatabase.FilePath),
                         calc)));
         }
 
@@ -423,7 +424,7 @@
             var activity = CreateHydraRingTargetProbabilityCalculationActivity(
                 context.FailureMechanism.Sections.First(), // TODO: Pass dike section based on cross section of calculation with reference line
                 calculation.InputParameters.HydraulicBoundaryLocation,
-                context.AssessmentSection.HydraulicBoundaryDatabase.FilePath,
+                Path.GetDirectoryName(context.AssessmentSection.HydraulicBoundaryDatabase.FilePath),
                 calculation);
 
             ActivityProgressDialogRunner.Run(Gui.MainWindow, activity);