Index: DamEngine/trunk/src/Deltares.DamEngine.Calculators/KernelWrappers/DamMacroStabilityInwards/DamMacroStabilityInwardsKernelWrapper.cs
===================================================================
diff -u -r1375 -r1390
--- DamEngine/trunk/src/Deltares.DamEngine.Calculators/KernelWrappers/DamMacroStabilityInwards/DamMacroStabilityInwardsKernelWrapper.cs	(.../DamMacroStabilityInwardsKernelWrapper.cs)	(revision 1375)
+++ DamEngine/trunk/src/Deltares.DamEngine.Calculators/KernelWrappers/DamMacroStabilityInwards/DamMacroStabilityInwardsKernelWrapper.cs	(.../DamMacroStabilityInwardsKernelWrapper.cs)	(revision 1390)
@@ -564,13 +564,12 @@
             var subSoilScenario = damKernelInput.SubSoilScenario;
             double riverLevel = damKernelInput.RiverLevelHigh;
             List<LogMessage> errorMessages;
-            // The following parameter is used for correctly creating the MStab file
-            // For the initial geometry, no previous geometry filenam has to be defined
             EmbankmentDesignParameters embankmentDesignParametersForCreatingMstabFile;
             if (iterationIndex < 1)
             {
-                // In the first prepareDesign, the initial geometry filename is determined and should be stored in the embankmentDesignParameters
-                // In the first iteration (height adaption), the embankment material is DikeEmbankmentMaterial
+                // This is the first (initial) call to prepareDesign.
+                // The initial geometry filename is determined and are stored in the embankmentDesignParameters.
+                // Also the embankment material is set to DikeEmbankmentMaterial, because the next iteration (Index = 1) will be height adaption 
                 embankmentDesignParameters = new EmbankmentDesignParameters()
                 {
                     EmbankmentMaterialname = location.DikeEmbankmentMaterial,
@@ -581,10 +580,12 @@
             }
             else
             {
-                // Iteration 1 = height adaption
-                // The following iterations are shoulder/slope adjustement): 
-                // - The embankment material is set to ShoulderEmbankmentMaterial 
-                // - The previous geometry is set to the height adapted geometry (name is constructed with iteration index 1)
+                // Calculation iterations start with IterationIndex = 1.
+                // When IterationIndex = 1: height adaption.
+                // When Iteration > 1: Slope/Shoulder adaption.
+                // Starting from IterationIndex 2 the following parameters should be used: 
+                // - The embankment material is set to ShoulderEmbankmentMaterial. 
+                // - The previous geometry is set to the height adapted geometry (name is constructed with iteration index 1).
                 if (iterationIndex == 2)
                 {
                     FailureMechanismParametersMStab.EmbankmentDesignParameters.EmbankmentMaterialname = location.ShoulderEmbankmentMaterial;