Index: Riskeer/Integration/src/Riskeer.Integration.Plugin/RiskeerPlugin.cs
===================================================================
diff -u -r365a159dfa3821f8e489ee20003dd422e249139b -r9f716e11cd1fed8c600bbb24e5ccdb383cbcbd07
--- Riskeer/Integration/src/Riskeer.Integration.Plugin/RiskeerPlugin.cs	(.../RiskeerPlugin.cs)	(revision 365a159dfa3821f8e489ee20003dd422e249139b)
+++ Riskeer/Integration/src/Riskeer.Integration.Plugin/RiskeerPlugin.cs	(.../RiskeerPlugin.cs)	(revision 9f716e11cd1fed8c600bbb24e5ccdb383cbcbd07)
@@ -949,7 +949,8 @@
             yield return new TreeNodeInfo<WaterLevelCalculationsForUserDefinedTargetProbabilitiesGroupContext>
             {
                 Text = context => RiskeerCommonFormsResources.WaterLevelCalculationsForUserDefinedTargetProbabilities_DisplayName,
-                Image = context => RiskeerCommonFormsResources.GeneralFolderIcon
+                Image = context => RiskeerCommonFormsResources.GeneralFolderIcon,
+                ChildNodeObjects = WaterLevelCalculationsForUserDefinedTargetProbabilitiesGroupContextChildNodes
             };
 
             yield return new TreeNodeInfo<WaterLevelCalculationsForUserDefinedTargetProbabilityContext>
@@ -961,7 +962,8 @@
             yield return new TreeNodeInfo<WaveHeightCalculationsForUserDefinedTargetProbabilitiesGroupContext>
             {
                 Text = context => RiskeerCommonFormsResources.WaveHeightCalculationsForUserDefinedTargetProbabilities_DisplayName,
-                Image = context => RiskeerCommonFormsResources.GeneralFolderIcon
+                Image = context => RiskeerCommonFormsResources.GeneralFolderIcon,
+                ChildNodeObjects = WaveHeightCalculationsForUserDefinedTargetProbabilitiesGroupContextChildNodes
             };
 
             yield return new TreeNodeInfo<WaveHeightCalculationsForUserDefinedTargetProbabilityContext>
@@ -2262,6 +2264,20 @@
             };
         }
 
+        private static object[] WaterLevelCalculationsForUserDefinedTargetProbabilitiesGroupContextChildNodes(WaterLevelCalculationsForUserDefinedTargetProbabilitiesGroupContext context)
+        {
+            return context.WrappedData
+                          .Select(calculations => (object) new WaterLevelCalculationsForUserDefinedTargetProbabilityContext(calculations, context.AssessmentSection))
+                          .ToArray();
+        }
+
+        private static object[] WaveHeightCalculationsForUserDefinedTargetProbabilitiesGroupContextChildNodes(WaveHeightCalculationsForUserDefinedTargetProbabilitiesGroupContext context)
+        {
+            return context.WrappedData
+                          .Select(calculations => (object) new WaveHeightCalculationsForUserDefinedTargetProbabilityContext(calculations, context.AssessmentSection))
+                          .ToArray();
+        }
+
         private ContextMenuStrip DesignWaterLevelCalculationsGroupContextMenuStrip(DesignWaterLevelCalculationsGroupContext nodeData, object parentData, TreeViewControl treeViewControl)
         {
             IAssessmentSection assessmentSection = nodeData.AssessmentSection;