Index: DamEngine/trunk/src/Deltares.DamEngine.Calculators/KernelWrappers/MacroStabilityCommon/PlLinesToWaternetConverter.cs
===================================================================
diff -u -r5436 -r5441
--- DamEngine/trunk/src/Deltares.DamEngine.Calculators/KernelWrappers/MacroStabilityCommon/PlLinesToWaternetConverter.cs	(.../PlLinesToWaternetConverter.cs)	(revision 5436)
+++ DamEngine/trunk/src/Deltares.DamEngine.Calculators/KernelWrappers/MacroStabilityCommon/PlLinesToWaternetConverter.cs	(.../PlLinesToWaternetConverter.cs)	(revision 5441)
@@ -580,7 +580,7 @@
     {
         for (var i = 0; i < points.Count - 1; i++)
         {
-            if (!(Math.Abs(points[i].X - points[i + 1].X) < toleranceAlmostEqual) || !(points[i].Z < points[i + 1].Z))
+            if ((Math.Abs(points[i].X - points[i + 1].X) >= toleranceAlmostEqual) || (points[i].Z >= points[i + 1].Z))
             {
                 continue;
             }