Index: Ringtoets/GrassCoverErosionInwards/src/Ringtoets.GrassCoverErosionInwards.Plugin/GrassCoverErosionInwardsGuiPlugin.cs
===================================================================
diff -u -r8f4a06a3283b4cf608d4de9693436de393063bf8 -r79279d5d69482de69ef6b4be98ad53e666ab06e2
--- Ringtoets/GrassCoverErosionInwards/src/Ringtoets.GrassCoverErosionInwards.Plugin/GrassCoverErosionInwardsGuiPlugin.cs	(.../GrassCoverErosionInwardsGuiPlugin.cs)	(revision 8f4a06a3283b4cf608d4de9693436de393063bf8)
+++ Ringtoets/GrassCoverErosionInwards/src/Ringtoets.GrassCoverErosionInwards.Plugin/GrassCoverErosionInwardsGuiPlugin.cs	(.../GrassCoverErosionInwardsGuiPlugin.cs)	(revision 79279d5d69482de69ef6b4be98ad53e666ab06e2)
@@ -28,6 +28,7 @@
 using Core.Common.Base.Data;
 using Core.Common.Controls.TreeView;
 using Core.Common.Gui.ContextMenu;
+using Core.Common.Gui.Forms.ProgressDialog;
 using Core.Common.Gui.Plugin;
 using Ringtoets.Common.Data;
 using Ringtoets.Common.Data.AssessmentSection;
@@ -387,7 +388,11 @@
 
             GrassCoverErosionInwardsCalculation calculation = nodeData.WrappedData;
 
-            CalculationTreeNodeInfoFactory.AddPerformCalculationItem(builder, calculation, null); //TODO: Actualy connect the calculation
+            CalculationTreeNodeInfoFactory.AddPerformCalculationItem(
+                builder,
+                calculation,
+                nodeData,
+                PerformCalculation);
             CalculationTreeNodeInfoFactory.AddClearCalculationOutputItem(builder, calculation);
             builder.AddSeparator();
 
@@ -405,6 +410,17 @@
                 .Build();
         }
 
+        private void PerformCalculation(GrassCoverErosionInwardsCalculation calculation, GrassCoverErosionInwardsCalculationContext context)
+        {
+            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,
+                calculation);
+
+            ActivityProgressDialogRunner.Run(Gui.MainWindow, activity);
+        }
+
         #endregion
     }
 }
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