Index: DamEngine/trunk/src/Deltares.DamEngine.Data/Geometry/GeometryLoop.cs
===================================================================
diff -u -r5061 -r5069
--- DamEngine/trunk/src/Deltares.DamEngine.Data/Geometry/GeometryLoop.cs	(.../GeometryLoop.cs)	(revision 5061)
+++ DamEngine/trunk/src/Deltares.DamEngine.Data/Geometry/GeometryLoop.cs	(.../GeometryLoop.cs)	(revision 5069)
@@ -252,7 +252,8 @@
         GeometryPointString clonedGeometryPointString = base.Clone();
         GeometryLoop clonedGeometryLoop = new GeometryLoop();
         clonedGeometryLoop.Points.AddRange(clonedGeometryPointString.Points);
-        clonedGeometryLoop.CurveList.AddRange(CurveList);
+        clonedGeometryLoop.SyncCalcPoints(); //Always sync the calcPoints after adding points or preferably add the calcPoints to the clonedGeometryPointString and synchronize the points (using SyncPoints)
+        clonedGeometryLoop.CurveList.AddRange(CurveList); // Wrong: The points in the new curves must be retrieved by location in the new pointlist in order to properly clone the curves
         return clonedGeometryLoop;
     }
 }
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