Index: DamClients/DamUI/trunk/src/DamClientsLibrary/Deltares.Dam.Data/DataPlugins/DataPluginImporter.cs
===================================================================
diff -u -r4206 -r4208
--- DamClients/DamUI/trunk/src/DamClientsLibrary/Deltares.Dam.Data/DataPlugins/DataPluginImporter.cs	(.../DataPluginImporter.cs)	(revision 4206)
+++ DamClients/DamUI/trunk/src/DamClientsLibrary/Deltares.Dam.Data/DataPlugins/DataPluginImporter.cs	(.../DataPluginImporter.cs)	(revision 4208)
@@ -561,7 +561,7 @@
         {
             TopLevel = soilProfile.BottomLevel,
             SoilName = SoilProfile1D.SoilProfileBottomLevelId,
-            IsAquifer = soilProfile.Layers.Last().IsAquifer
+            IsAquifer = soilProfile.Layers[soilProfile.Layers.Count - 1].IsAquifer
         };
         dpSoilProfile.Layers.Add(bottomLevelLayer);
         return dpSoilProfile;