Index: DamEngine/trunk/src/Deltares.DamEngine.Calculators/KernelWrappers/MacroStabilityCommon/PlLinesToWaternetConverter.cs
===================================================================
diff -u -r5020 -r5025
--- DamEngine/trunk/src/Deltares.DamEngine.Calculators/KernelWrappers/MacroStabilityCommon/PlLinesToWaternetConverter.cs	(.../PlLinesToWaternetConverter.cs)	(revision 5020)
+++ DamEngine/trunk/src/Deltares.DamEngine.Calculators/KernelWrappers/MacroStabilityCommon/PlLinesToWaternetConverter.cs	(.../PlLinesToWaternetConverter.cs)	(revision 5025)
@@ -76,7 +76,7 @@
 
         if (soilProfile1D.BottomAquiferLayer == null)
         {
-            throw new Exception(string.Format(Resources.NoBottomAquiferLayer, soilProfile1D.Name));
+            throw new NoNullAllowedException(string.Format(Resources.NoBottomAquiferLayer, soilProfile1D.Name));
         }
 
         var waternet = new Waternet();
@@ -144,7 +144,7 @@
         Point2D[] bottomAquiferCoordinates = DetermineLayerBoundaryPoints(LayerType.BottomAquifer, soilProfile).ToArray();
         if (!bottomAquiferCoordinates.Any())
         {
-            throw new Exception(string.Format(Resources.NoBottomAquiferLayer, soilProfile.Name));
+            throw new NoNullAllowedException(string.Format(Resources.NoBottomAquiferLayer, soilProfile.Name));
         }
 
         var waternet = new Waternet();