Index: Ringtoets/MacroStabilityInwards/src/Ringtoets.MacroStabilityInwards.CalculatedInput/Converters/SoilProfileConverter.cs
===================================================================
diff -u -r88aeb657842c614e037562cadb293b08862458d4 -r42b0a40e019f6b36f83495fc46b13bac5971292f
--- Ringtoets/MacroStabilityInwards/src/Ringtoets.MacroStabilityInwards.CalculatedInput/Converters/SoilProfileConverter.cs	(.../SoilProfileConverter.cs)	(revision 88aeb657842c614e037562cadb293b08862458d4)
+++ Ringtoets/MacroStabilityInwards/src/Ringtoets.MacroStabilityInwards.CalculatedInput/Converters/SoilProfileConverter.cs	(.../SoilProfileConverter.cs)	(revision 42b0a40e019f6b36f83495fc46b13bac5971292f)
@@ -101,7 +101,7 @@
             }).ToArray();
         }
 
-        private static Point2D[] RingToPoints(Ring ring)
+        private static IEnumerable<Point2D> RingToPoints(Ring ring)
         {
             return ring.Points.ToArray();
         }
@@ -111,7 +111,8 @@
         {
             return preconsolidationStresses.Select(ps => new PreconsolidationStress(
                                                        ps.Location,
-                                                       MacroStabilityInwardsSemiProbabilisticDesignVariableFactory.GetPreconsolidationStress(ps).GetDesignValue()));
+                                                       MacroStabilityInwardsSemiProbabilisticDesignVariableFactory.GetPreconsolidationStress(ps).GetDesignValue()))
+                                           .ToArray();
         }
 
         /// <summary>