Index: DamEngine/trunk/src/Deltares.DamEngine.Calculators/KernelWrappers/WtiMacroStabilityInwards/WtiMacroStabilityInwardsKernelWrapper.cs
===================================================================
diff -u -r1955 -r1962
--- DamEngine/trunk/src/Deltares.DamEngine.Calculators/KernelWrappers/WtiMacroStabilityInwards/WtiMacroStabilityInwardsKernelWrapper.cs	(.../WtiMacroStabilityInwardsKernelWrapper.cs)	(revision 1955)
+++ DamEngine/trunk/src/Deltares.DamEngine.Calculators/KernelWrappers/WtiMacroStabilityInwards/WtiMacroStabilityInwardsKernelWrapper.cs	(.../WtiMacroStabilityInwardsKernelWrapper.cs)	(revision 1962)
@@ -121,15 +121,27 @@
         public int Validate(IKernelDataInput kernelDataInput, IKernelDataOutput kernelDataOutput, out List<LogMessage> messages)
         {
             ThrowWhenWtiMacroStabilityCalculatorNull(wtiMacroStabilityCalculator);
-            string kernelMessage = wtiMacroStabilityCalculator.Validate();
-            ParseValidationResult(kernelMessage, out messages);
-            WtiMacroStabilityOutput macroStabilityOutput = (WtiMacroStabilityOutput)kernelDataOutput;
-            var numberOfErrors = messages.Count(mt => mt.MessageType == LogMessageType.Error);
-            if (numberOfErrors > 0)
+            if (tmpPresumeInputValid)
             {
-                macroStabilityOutput.CalculationResult = CalculationResult.InvalidInputData;
+                messages = new List<LogMessage>();
+                return 0;
             }
-            return numberOfErrors;
+            else
+            {
+                messages = new List<LogMessage>();
+                messages.Add(new LogMessage(LogMessageType.Error, null, "Not implemented yet"));
+                // Todo MWDAM-1356 : make valid XML, only then following lines can be enabled
+                //                string kernelMessage = wtiMacroStabilityCalculator.Validate();
+                //                ParseValidationResult(kernelMessage, out messages);
+                WtiMacroStabilityOutput macroStabilityOutput = (WtiMacroStabilityOutput)kernelDataOutput;
+                var numberOfErrors = messages.Count(mt => mt.MessageType == LogMessageType.Error);
+                if (numberOfErrors > 0)
+                {
+                    macroStabilityOutput.CalculationResult = CalculationResult.InvalidInputData;
+                }
+                return numberOfErrors;
+
+            }
         }
 
         internal void ParseValidationResult(string xmlValidationResult, out List<LogMessage> messages)
@@ -175,7 +187,7 @@
         }
 
 
-        private void PerformWtiStabilityCalculation(out List<LogMessage> messages, WtiMacroStabilityOutput macroStabilityOutput, 
+        private void PerformWtiStabilityCalculation(out List<LogMessage> messages, WtiMacroStabilityOutput macroStabilityOutput,
             WtiMacroStabilityInput macroStabilityInput)
         {
             ThrowWhenWtiMacroStabilityCalculatorNull(wtiMacroStabilityCalculator);
@@ -263,7 +275,7 @@
             }
         }
 
-        private DesignResult NewDesignResult(DamKernelInput damKernelInput, DesignScenario designScenario, 
+        private DesignResult NewDesignResult(DamKernelInput damKernelInput, DesignScenario designScenario,
             WtiMacroStabilityOutputItem macroStabilityOutputItem)
         {
             string soilProfile2DName = damKernelInput.SubSoilScenario.ToString();
Index: DamEngine/trunk/src/Deltares.DamEngine.Calculators.Tests/KernelWrappers/WtiMacroStabilityInwards/WtiMacroStabilityInwardsKernelWrapperTests.cs
===================================================================
diff -u -r1955 -r1962
--- DamEngine/trunk/src/Deltares.DamEngine.Calculators.Tests/KernelWrappers/WtiMacroStabilityInwards/WtiMacroStabilityInwardsKernelWrapperTests.cs	(.../WtiMacroStabilityInwardsKernelWrapperTests.cs)	(revision 1955)
+++ DamEngine/trunk/src/Deltares.DamEngine.Calculators.Tests/KernelWrappers/WtiMacroStabilityInwards/WtiMacroStabilityInwardsKernelWrapperTests.cs	(.../WtiMacroStabilityInwardsKernelWrapperTests.cs)	(revision 1962)
@@ -188,12 +188,14 @@
             IKernelDataInput kernelDataInput;
             IKernelDataOutput kernelDataOutput;
             var kernelInput = CreateDamKernelInputForTest();
-            kernelWrapper.Prepare(kernelInput, 0, out kernelDataInput, out kernelDataOutput);
+            PrepareResult prepareResult;
+            prepareResult = kernelWrapper.Prepare(kernelInput, 0, out kernelDataInput, out kernelDataOutput);
             // ToDo MWDAM-1356: xml input not written yet. Skip for now.
             //Assert.AreEqual(PrepareResult.Successful, prepareResult1);
 
             // Validate the input
             List<LogMessage> messages;
+            kernelWrapper.tmpPresumeInputValid = true; //ToDo replace by input that makes Validate succeed
             var errorCount = kernelWrapper.Validate(kernelDataInput, kernelDataOutput, out messages);
             // ToDo MWDAM-1367: Not clear yet what input must be provided to make Validate succeed. Skip for now.
             //Assert.IsTrue(errorCount == 0);