Index: DamEngine/trunk/src/Deltares.DamEngine.Data/General/Dike.cs
===================================================================
diff -u -r5223 -r5406
--- DamEngine/trunk/src/Deltares.DamEngine.Data/General/Dike.cs	(.../Dike.cs)	(revision 5223)
+++ DamEngine/trunk/src/Deltares.DamEngine.Data/General/Dike.cs	(.../Dike.cs)	(revision 5406)
@@ -187,13 +187,12 @@
     /// </summary>
     public void ClearLocationScenariosExceptFirst()
     {
-        Locations = Locations.Select(location =>
+        foreach (Location location in Locations)
         {
             DesignScenario scenario = location.Scenarios[0].CloneInput();
             location.Scenarios.Clear();
             location.Scenarios.Add(scenario);
-            return location;
-        }).ToList();
+        }
     }
 
     /// <summary>