Index: DamEngine/trunk/src/Deltares.DamEngine.Calculators/KernelWrappers/MacroStabilityCommon/MacroStabilityCommonHelper.cs
===================================================================
diff -u -r5268 -r5302
--- DamEngine/trunk/src/Deltares.DamEngine.Calculators/KernelWrappers/MacroStabilityCommon/MacroStabilityCommonHelper.cs	(.../MacroStabilityCommonHelper.cs)	(revision 5268)
+++ DamEngine/trunk/src/Deltares.DamEngine.Calculators/KernelWrappers/MacroStabilityCommon/MacroStabilityCommonHelper.cs	(.../MacroStabilityCommonHelper.cs)	(revision 5302)
@@ -367,7 +367,11 @@
                                             string fileName, Calculator calculator, out List<LogMessage> messages)
     {
         macroStabilityOutput.CalculationResult = CalculationResult.NoRun;
-        macroStabilityOutput.StabilityOutputItems = new List<MacroStabilityOutputItem>();
+        if (macroStabilityOutput.StabilityOutputItems == null)
+        {
+            macroStabilityOutput.StabilityOutputItems = new List<MacroStabilityOutputItem>();
+        }
+
         messages = new List<LogMessage>();
         try
         {