Index: Ringtoets/GrassCoverErosionInwards/src/Ringtoets.GrassCoverErosionInwards.Forms/Views/GrassCoverErosionInwardsScenariosView.cs
===================================================================
diff -u -r04e2ad28172dab2091ef18840dfc0ba77c6c0c7d -r93baa4ee308eff5a157e37bd2b4fe148a45806af
--- Ringtoets/GrassCoverErosionInwards/src/Ringtoets.GrassCoverErosionInwards.Forms/Views/GrassCoverErosionInwardsScenariosView.cs	(.../GrassCoverErosionInwardsScenariosView.cs)	(revision 04e2ad28172dab2091ef18840dfc0ba77c6c0c7d)
+++ Ringtoets/GrassCoverErosionInwards/src/Ringtoets.GrassCoverErosionInwards.Forms/Views/GrassCoverErosionInwardsScenariosView.cs	(.../GrassCoverErosionInwardsScenariosView.cs)	(revision 93baa4ee308eff5a157e37bd2b4fe148a45806af)
@@ -120,19 +120,19 @@
         {
             scenarioSelectionControl.EndEdit();
 
-            if (FailureMechanism == null || FailureMechanism.SectionResults == null || data == null || data.Children == null)
+            if (failureMechanism == null || failureMechanism.SectionResults == null || data == null || data.Children == null)
             {
                 scenarioSelectionControl.ClearDataSource();
             }
             else
             {
-                var calculations = data.GetCalculations();
+                var calculations = data.GetCalculations().ToArray();
 
                 Dictionary<string, IList<ICalculation>> calculationsPerSegment =
                     GrassCoverErosionInwardsHelper.CollectCalculationsPerSection(failureMechanism.Sections, calculations.OfType<GrassCoverErosionInwardsCalculation>());
 
                 List<GrassCoverErosionInwardsScenarioRow> scenarioRows =
-                    FailureMechanism.SectionResults.Select(sectionResult => new GrassCoverErosionInwardsScenarioRow(sectionResult)).ToList();
+                    failureMechanism.SectionResults.Select(sectionResult => new GrassCoverErosionInwardsScenarioRow(sectionResult)).ToList();
 
                 scenarioSelectionControl.UpdateDataGridViewDataSource(calculations, scenarioRows, calculationsPerSegment);
             }