Index: Ringtoets/GrassCoverErosionInwards/src/Ringtoets.GrassCoverErosionInwards.Service/GrassCoverErosionInwardsCalculationActivity.cs
===================================================================
diff -u -rab2f7996c204ca193fb728b3983b75a97c92c7b6 -r0f61433cb005ad04374dbe99e0a553b967afe64d
--- Ringtoets/GrassCoverErosionInwards/src/Ringtoets.GrassCoverErosionInwards.Service/GrassCoverErosionInwardsCalculationActivity.cs	(.../GrassCoverErosionInwardsCalculationActivity.cs)	(revision ab2f7996c204ca193fb728b3983b75a97c92c7b6)
+++ Ringtoets/GrassCoverErosionInwards/src/Ringtoets.GrassCoverErosionInwards.Service/GrassCoverErosionInwardsCalculationActivity.cs	(.../GrassCoverErosionInwardsCalculationActivity.cs)	(revision 0f61433cb005ad04374dbe99e0a553b967afe64d)
@@ -33,7 +33,6 @@
     internal class GrassCoverErosionInwardsCalculationActivity : CalculatableActivity
     {
         private readonly GrassCoverErosionInwardsCalculation calculation;
-        private readonly string hydraulicBoundaryDatabaseFilePath;
         private readonly GrassCoverErosionInwardsFailureMechanism failureMechanism;
         private readonly IAssessmentSection assessmentSection;
         private readonly GrassCoverErosionInwardsCalculationService calculationService;
@@ -42,21 +41,14 @@
         /// Creates a new instance of <see cref="GrassCoverErosionInwardsCalculationActivity"/>.
         /// </summary>
         /// <param name="calculation">The height structures data used for the calculation.</param>
-        /// <param name="hydraulicBoundaryDatabaseFilePath">The path which points to the hydraulic boundary database file.</param>
         /// <param name="failureMechanism">The failure mechanism the calculation belongs to.</param>
         /// <param name="assessmentSection">The assessment section the calculation belongs to.</param>
         /// <exception cref="ArgumentNullException">Thrown when any input argument is <c>null</c>.</exception>
         public GrassCoverErosionInwardsCalculationActivity(GrassCoverErosionInwardsCalculation calculation,
-                                                           string hydraulicBoundaryDatabaseFilePath,
                                                            GrassCoverErosionInwardsFailureMechanism failureMechanism,
                                                            IAssessmentSection assessmentSection)
             : base(calculation)
         {
-            if (hydraulicBoundaryDatabaseFilePath == null)
-            {
-                throw new ArgumentNullException(nameof(hydraulicBoundaryDatabaseFilePath));
-            }
-
             if (failureMechanism == null)
             {
                 throw new ArgumentNullException(nameof(failureMechanism));
@@ -68,7 +60,6 @@
             }
 
             this.calculation = calculation;
-            this.hydraulicBoundaryDatabaseFilePath = hydraulicBoundaryDatabaseFilePath;
             this.failureMechanism = failureMechanism;
             this.assessmentSection = assessmentSection;
 
@@ -94,7 +85,7 @@
                 assessmentSection,
                 failureMechanism.GeneralInput,
                 failureMechanism.Contribution,
-                hydraulicBoundaryDatabaseFilePath);
+                assessmentSection.HydraulicBoundaryDatabase.FilePath);
         }
 
         protected override void OnCancel()