Index: Ringtoets/GrassCoverErosionInwards/src/Ringtoets.GrassCoverErosionInwards.Plugin/GrassCoverErosionInwardsGuiPlugin.cs
===================================================================
diff -u -r4539b4546747c257739b1695b9ebc9c29e393ffe -raa25878040adae11a80608496eac9f103ae54774
--- Ringtoets/GrassCoverErosionInwards/src/Ringtoets.GrassCoverErosionInwards.Plugin/GrassCoverErosionInwardsGuiPlugin.cs	(.../GrassCoverErosionInwardsGuiPlugin.cs)	(revision 4539b4546747c257739b1695b9ebc9c29e393ffe)
+++ Ringtoets/GrassCoverErosionInwards/src/Ringtoets.GrassCoverErosionInwards.Plugin/GrassCoverErosionInwardsGuiPlugin.cs	(.../GrassCoverErosionInwardsGuiPlugin.cs)	(revision aa25878040adae11a80608496eac9f103ae54774)
@@ -197,6 +197,7 @@
 
         private void CalculateAll(IFailureMechanism failureMechanism, IEnumerable<GrassCoverErosionInwardsCalculation> calculations, IAssessmentSection assessmentSection)
         {
+            // TODO: Remove "Where" filter when validation is implemented
             ActivityProgressDialogRunner.Run(Gui.MainWindow, calculations.Where(calc => calc.InputParameters.HydraulicBoundaryLocation != null)
                                                                          .Select(calc => CreateHydraRingTargetProbabilityCalculationActivity(
                                                                              failureMechanism.Sections.First(), // TODO: Pass dike section based on cross section of calculation with reference line
@@ -462,6 +463,7 @@
 
         private void PerformCalculation(GrassCoverErosionInwardsCalculation calculation, GrassCoverErosionInwardsCalculationContext context)
         {
+            // TODO: Remove null-check when validation is implemented
             if (calculation.InputParameters.HydraulicBoundaryLocation == null)
             {
                 return;