Index: Riskeer/Common/src/Riskeer.Common.Data/MechanismSurfaceLineBase.cs
===================================================================
diff -u -r46ca6081f1adbbddf7c707fca8c425a0394bb735 -r78c71ea83f6fb606e3d76e49b6b072dd4af06d3a
--- Riskeer/Common/src/Riskeer.Common.Data/MechanismSurfaceLineBase.cs	(.../MechanismSurfaceLineBase.cs)	(revision 46ca6081f1adbbddf7c707fca8c425a0394bb735)
+++ Riskeer/Common/src/Riskeer.Common.Data/MechanismSurfaceLineBase.cs	(.../MechanismSurfaceLineBase.cs)	(revision 78c71ea83f6fb606e3d76e49b6b072dd4af06d3a)
@@ -190,7 +190,7 @@
             Point2D firstLocalPoint = LocalGeometry.First();
             Point2D lastLocalPoint = LocalGeometry.Last();
             var roundedLocalCoordinateL = new RoundedDouble(numberOfDecimalPlaces, localCoordinateL);
-            return !(firstLocalPoint.X > roundedLocalCoordinateL) && !(lastLocalPoint.X < roundedLocalCoordinateL);
+            return roundedLocalCoordinateL >= firstLocalPoint.X && roundedLocalCoordinateL <= lastLocalPoint.X;
         }
 
         public override string ToString()