Index: DamClients/DamUI/trunk/src/DamClientsLibrary/Deltares.Dam.Data/Geometry2DImporter/SoilProfile2DImporter.cs
===================================================================
diff -u -r5903 -r5906
--- DamClients/DamUI/trunk/src/DamClientsLibrary/Deltares.Dam.Data/Geometry2DImporter/SoilProfile2DImporter.cs	(.../SoilProfile2DImporter.cs)	(revision 5903)
+++ DamClients/DamUI/trunk/src/DamClientsLibrary/Deltares.Dam.Data/Geometry2DImporter/SoilProfile2DImporter.cs	(.../SoilProfile2DImporter.cs)	(revision 5906)
@@ -157,11 +157,12 @@
     private static Soil FindSoilInOldSurfaces(List<SoilLayer2D> originalSurfaces, GeometryPoint point, 
                                               double xSoilGeometry2DOrigin)
     {
-        point.X -= xSoilGeometry2DOrigin;
-        point.Z -= GeometryConstants.Accuracy;
+        var np = new GeometryPoint(point.X, point.Y, point.Z);
+        np.X -= xSoilGeometry2DOrigin;
+        np.Z -= GeometryConstants.Accuracy;
         foreach (var soilLayer2D in originalSurfaces)
         {
-            if (soilLayer2D.GeometrySurface.OuterLoop.IsPointInLoopArea(point))
+            if (soilLayer2D.GeometrySurface.OuterLoop.IsPointInLoopArea(np))
             {
                 return soilLayer2D.Soil;
             }
@@ -172,7 +173,8 @@
             st = st + " " + geometryPoint.ToString();
         }
         
-        throw new InvalidOperationException("Soil should always be found at point X =" + point.X + " point Z = " + point.Z + " in surface " + st);
+        throw new InvalidOperationException("Soil should always be found at org point X =" + point.X + " point Z = " + point.Z + 
+                                            " in surface " + st + " point X =" + np.X + " point Z = " + np.Z + "with offset" + xSoilGeometry2DOrigin);
         return null;
     }