Index: DamEngine/trunk/src/Deltares.DamEngine.Calculators/KernelWrappers/MacroStabilityCommon/MacroStabilityIo/FillMacroStabilityInterfaceInputFromEngine.cs
===================================================================
diff -u -r6322 -r6329
--- DamEngine/trunk/src/Deltares.DamEngine.Calculators/KernelWrappers/MacroStabilityCommon/MacroStabilityIo/FillMacroStabilityInterfaceInputFromEngine.cs	(.../FillMacroStabilityInterfaceInputFromEngine.cs)	(revision 6322)
+++ DamEngine/trunk/src/Deltares.DamEngine.Calculators/KernelWrappers/MacroStabilityCommon/MacroStabilityIo/FillMacroStabilityInterfaceInputFromEngine.cs	(.../FillMacroStabilityInterfaceInputFromEngine.cs)	(revision 6329)
@@ -139,14 +139,14 @@
         var objectRegistry = new ObjectRegistry();
         var fullInputModelType = new FullInputModelType
         {
-            PreprocessingInput = TransferPreprocessingInput(damKernelInput),
+            PreprocessingInput = TransferPreprocessingInput(damKernelInput, mStabParameters),
             StabilityModel = TransferStabilityModel(damKernelInput, mStabParameters, objectRegistry),
             VersionInfo = TransferVersionInfo()
         };
         return fullInputModelType;
     }
 
-    private PreprocessingInputType TransferPreprocessingInput(DamKernelInput damKernelInput)
+    private PreprocessingInputType TransferPreprocessingInput(DamKernelInput damKernelInput, MStabParameters mStabParameters)
     {
         if (damKernelInput == null)
             return null;
@@ -158,10 +158,103 @@
         preConstructionLastStage.Surfaceline = new SurfaceLineType();
         preConstructionLastStage.CreateWaternet = false; // #Bka: I can NOT find any use of this at the engine side so this must be false!? 
         TransferSurfaceLine(damKernelInput.Location.SurfaceLine, preConstructionLastStage.Surfaceline);
-        //preprocessingInputType.SearchAreaConditions =
+
+        preprocessingInputType.SearchAreaConditions = TransferSearchAreaCondition(damKernelInput, mStabParameters);
+         
         return preprocessingInputType;
     }
 
+    private SearchAreaConditionsType TransferSearchAreaCondition(DamKernelInput damKernelInput, MStabParameters mStabParameters)
+    {
+        SearchAreaConditionsType preprocessingSearchAreaConditions = new SearchAreaConditionsType
+        {
+            AutoGeneticAlgorithmOptions = false, //#Bka or true? is not to be found at engine side
+            AutoGeneticAlgorithmOptionsSpecified = true,
+            AutoLevenbergMarquardtOptions = false, //#Bka or true? is not to be found at engine side
+            AutoLevenbergMarquardtOptionsSpecified = true,
+            AutoSearchAreaSpecified = true,
+            AutoTangentLinesSpecified = true,
+            AutomaticForbiddenZones = false, //#Bka or true? is not to be found at engine side
+            AutomaticForbiddenZonesSpecified = true,
+            MaxSpacingBetweenBoundaries = 0.8,
+            MaxSpacingBetweenBoundariesSpecified = true,
+            OnlyAbovePleistoceenSpecified = true,
+            SlipPlanePosition = SearchAreaConditionsTypeSlipPlanePosition.High, //#Bka = default in C#wrapper, is not to be found at engine side
+            SlipPlanePositionSpecified = true,
+            TangentLineNumberSpecified = true,
+            TangentLineZBottomSpecified = true,
+            TangentLineZTopSpecified = true   
+        };
+        
+        switch (mStabParameters.Model)
+        {
+            case StabilityModelType.Bishop:
+                TransferBishopSearchAreaSettings(preprocessingSearchAreaConditions);
+                //BishopCalculationCircle = TransferBishopCalculationGrid(); #Bka, moet naar TransferStabilityModel want geen deel van TransferPreprocessingInput
+                break;
+            case StabilityModelType.UpliftVan:
+                TransferUpliftVanSearchAreaSettings(preprocessingSearchAreaConditions);
+                //UpliftVanCalculationGrid = TransferUpliftVanCalculationGrid(); #Bka, toevoegen en moet naar TransferStabilityModel want geen deel van TransferPreprocessingInput
+                break;
+            default:
+                throw new NotImplementedException(nameof(mStabParameters.Model));
+        }
+
+        return preprocessingSearchAreaConditions;
+    }
+    
+    private void TransferBishopSearchAreaSettings(SearchAreaConditionsType searchAreaConditions)
+    {
+        // In the Macrostability kernel, for Bishop, the automatic tangent lines are set by AutoSearchArea = True.
+        // Setting AutoTangentLines to true will create the automatic tangent lines of Uplift-Van which is not desired.
+        searchAreaConditions.AutoTangentLines = false;
+        searchAreaConditions.AutoSearchArea = BishopCalculationGrid.IsSearchAreaAutomatic;
+        searchAreaConditions.TangentLineNumber = BishopCalculationGrid.TangentLineCount;
+        searchAreaConditions.TangentLineZTop = BishopCalculationGrid.TangentLineZTop;
+        searchAreaConditions.TangentLineZBottom = BishopCalculationGrid.TangentLineZBottom;
+    }
+    
+    private void TransferUpliftVanSearchAreaSettings(SearchAreaConditionsType kernelSearchAreaConditions)
+    {
+        kernelSearchAreaConditions.AutoTangentLines = UpliftVanCalculationGrid.TangentLinesCreationMethod is TangentLinesDefinition.Automatic or TangentLinesDefinition.OnBoundaryLines;
+        kernelSearchAreaConditions.AutoSearchArea = UpliftVanCalculationGrid.IsGridsAutomatic;
+        kernelSearchAreaConditions.OnlyAbovePleistoceen = UpliftVanCalculationGrid.TangentLinesCreationMethod == TangentLinesDefinition.Automatic;
+        kernelSearchAreaConditions.MaxSpacingBetweenBoundaries = 0.8;
+        kernelSearchAreaConditions.TangentLineNumber = UpliftVanCalculationGrid.TangentLineCount;
+        kernelSearchAreaConditions.TangentLineZTop = UpliftVanCalculationGrid.TangentLineZTop;
+        kernelSearchAreaConditions.TangentLineZBottom = UpliftVanCalculationGrid.TangentLineZBottom;
+    }
+    
+    private BishopCalculationCircle TransferBishopCalculationGrid()
+    {
+        if (BishopCalculationGrid == null)
+        {
+            throw new ArgumentNullException(nameof(BishopCalculationGrid));
+        }
+
+        var kernelBishopCalculationCircle = new BishopCalculationCircle
+        {
+            Grid = new CalculationGridType()
+            {
+
+                GridXNumber = BishopCalculationGrid.GridXCount,
+                GridXLeft = BishopCalculationGrid.GridXLeft,
+                GridXRight = BishopCalculationGrid.GridXRight,
+                GridZNumber = BishopCalculationGrid.GridZCount,
+                GridZTop = BishopCalculationGrid.GridZTop,
+                GridZBottom = BishopCalculationGrid.GridZBottom
+            }
+        };
+
+        if (!BishopCalculationGrid.IsSearchAreaAutomatic)
+        {
+            kernelBishopCalculationCircle.TangentLines = new double[BishopCalculationGrid.TangentLineLevels.Count];
+            kernelBishopCalculationCircle.TangentLines = BishopCalculationGrid.TangentLineLevels.ToArray();
+        }
+
+        return kernelBishopCalculationCircle;
+    }
+    
     private void TransferSurfaceLine(SurfaceLine2 surfaceLineInput, SurfaceLineType surfaceLine)
     {
         surfaceLine.CharacteristicPoints = new SurfaceLineTypeCharacteristicPoint[surfaceLine.CharacteristicPoints.Length];