Index: DamEngine/trunk/src/Deltares.DamEngine.Calculators/KernelWrappers/MacroStabilityCommon/MacroStabilityCommonHelper.cs
===================================================================
diff -u -r5302 -r5304
--- DamEngine/trunk/src/Deltares.DamEngine.Calculators/KernelWrappers/MacroStabilityCommon/MacroStabilityCommonHelper.cs	(.../MacroStabilityCommonHelper.cs)	(revision 5302)
+++ DamEngine/trunk/src/Deltares.DamEngine.Calculators/KernelWrappers/MacroStabilityCommon/MacroStabilityCommonHelper.cs	(.../MacroStabilityCommonHelper.cs)	(revision 5304)
@@ -367,10 +367,7 @@
                                             string fileName, Calculator calculator, out List<LogMessage> messages)
     {
         macroStabilityOutput.CalculationResult = CalculationResult.NoRun;
-        if (macroStabilityOutput.StabilityOutputItems == null)
-        {
-            macroStabilityOutput.StabilityOutputItems = new List<MacroStabilityOutputItem>();
-        }
+        macroStabilityOutput.StabilityOutputItems ??= [];
 
         messages = new List<LogMessage>();
         try
Index: DamEngine/trunk/src/Deltares.DamEngine.Calculators/KernelWrappers/MacroStabilityCommon/MacroStabilityIo/FillEngineFromMacroStabilityWrapperOutput.cs
===================================================================
diff -u -r5302 -r5304
--- DamEngine/trunk/src/Deltares.DamEngine.Calculators/KernelWrappers/MacroStabilityCommon/MacroStabilityIo/FillEngineFromMacroStabilityWrapperOutput.cs	(.../FillEngineFromMacroStabilityWrapperOutput.cs)	(revision 5302)
+++ DamEngine/trunk/src/Deltares.DamEngine.Calculators/KernelWrappers/MacroStabilityCommon/MacroStabilityIo/FillEngineFromMacroStabilityWrapperOutput.cs	(.../FillEngineFromMacroStabilityWrapperOutput.cs)	(revision 5304)
@@ -53,6 +53,7 @@
         macroStabilityOutput.CalculationResult = ConversionHelper.ConvertToDamResultType(kernelOutput.ResultType);
         if (kernelOutput.StabilityOutput != null)
         {
+            macroStabilityOutput.StabilityOutputItems ??= [];
             var outputItem = new MacroStabilityOutputItem
             {
                 CalculationResult = ConversionHelper.ConvertToDamResultType(kernelOutput.ResultType),
Index: DamEngine/trunk/src/Deltares.DamEngine.Calculators/KernelWrappers/MacroStabilityInwards/MacroStabilityInwardsKernelWrapper.cs
===================================================================
diff -u -r5303 -r5304
--- DamEngine/trunk/src/Deltares.DamEngine.Calculators/KernelWrappers/MacroStabilityInwards/MacroStabilityInwardsKernelWrapper.cs	(.../MacroStabilityInwardsKernelWrapper.cs)	(revision 5303)
+++ DamEngine/trunk/src/Deltares.DamEngine.Calculators/KernelWrappers/MacroStabilityInwards/MacroStabilityInwardsKernelWrapper.cs	(.../MacroStabilityInwardsKernelWrapper.cs)	(revision 5304)
@@ -318,14 +318,11 @@
                 }
 
                 macroStabilityOutputItem = ProperMacroStabilityResultsItem(macroStabilityOutput, index);
-                if (macroStabilityOutputItem != null)
-                {
-                    DesignResult overallResult = MacroStabilityCommonHelper.NewDesignResult(damKernelInput, designScenario);
-                    MacroStabilityCommonHelper.FillDesignResult(macroStabilityOutputItem, overallResult);
-                    overallResult.StabilityDesignResults.UpliftSituation = macroStabilityOutput.UpliftSituation;
-                    overallResult.StabilityDesignResults.StabilityModelType = MStabModelType.BishopUpliftVan;
-                    designResults.Add(overallResult);
-                }
+                DesignResult overallResult = MacroStabilityCommonHelper.NewDesignResult(damKernelInput, designScenario);
+                MacroStabilityCommonHelper.FillDesignResult(macroStabilityOutputItem, overallResult);
+                overallResult.StabilityDesignResults.UpliftSituation = macroStabilityOutput.UpliftSituation;
+                overallResult.StabilityDesignResults.StabilityModelType = MStabModelType.BishopUpliftVan;
+                designResults.Add(overallResult);
             }
             // If not both Bishop and Uplift-Van results are available, this is unexpected.
             else