Index: DamEngine/trunk/src/Deltares.DamEngine.Data/Geometry/GeometryLoop.cs
===================================================================
diff -u -r5073 -r5111
--- DamEngine/trunk/src/Deltares.DamEngine.Data/Geometry/GeometryLoop.cs	(.../GeometryLoop.cs)	(revision 5073)
+++ DamEngine/trunk/src/Deltares.DamEngine.Data/Geometry/GeometryLoop.cs	(.../GeometryLoop.cs)	(revision 5111)
@@ -249,7 +249,12 @@
     /// <returns>The cloned GeometryLoop</returns>
     public override GeometryLoop Clone()
     {
-        SyncPoints();
+        // Note: explicit use of CalcPoints to ensure calcPoints are populated 
+        var p = CalcPoints;
+        if (p.Count > 0)
+        {
+            SyncPoints();
+        }
         GeometryPointString clonedGeometryPointString = base.Clone();
         var clonedGeometryLoop = new GeometryLoop();
         clonedGeometryLoop.Points.AddRange(clonedGeometryPointString.Points);