Index: dam engine/trunk/src/Deltares.DamEngine.Calculators/General/ThrowHelper.cs
===================================================================
diff -u -r452 -r670
--- dam engine/trunk/src/Deltares.DamEngine.Calculators/General/ThrowHelper.cs	(.../ThrowHelper.cs)	(revision 452)
+++ dam engine/trunk/src/Deltares.DamEngine.Calculators/General/ThrowHelper.cs	(.../ThrowHelper.cs)	(revision 670)
@@ -81,9 +81,7 @@
         SurfaceLineNotAssigned,
         SoilProfileNotAssigned,
         SoilListIsNull,
-        PL1NotCreated,
-        NonWaterRetainingObjectCategoryArgumentNullOrEmpty,
-        NonWaterRetainingObjectTypeArgumentNullOrEmpty
+        PL1NotCreated        
     }
 
     /// <summary>