Index: DamEngine/trunk/src/Deltares.DamEngine.Calculators/KernelWrappers/Common/KernelWrapperHelper.cs
===================================================================
diff -u -r1586 -r1694
--- DamEngine/trunk/src/Deltares.DamEngine.Calculators/KernelWrappers/Common/KernelWrapperHelper.cs	(.../KernelWrapperHelper.cs)	(revision 1586)
+++ DamEngine/trunk/src/Deltares.DamEngine.Calculators/KernelWrappers/Common/KernelWrapperHelper.cs	(.../KernelWrapperHelper.cs)	(revision 1694)
@@ -30,6 +30,7 @@
 using Deltares.DamEngine.Calculators.KernelWrappers.WbiPipingSellmeijerRevised;
 using Deltares.DamEngine.Calculators.Properties;
 using Deltares.DamEngine.Data.General;
+using Deltares.DamEngine.Data.Standard;
 
 namespace Deltares.DamEngine.Calculators.KernelWrappers.Common
 {
@@ -61,7 +62,7 @@
                 case FailureMechanismSystemType.StabilityInside:
                     kernelWrapper = new DamMacroStabilityInwardsKernelWrapper();
                     var damMacroStabilityKernelWrapper = (DamMacroStabilityInwardsKernelWrapper)kernelWrapper;
-                    damMacroStabilityKernelWrapper.FailureMechanismParametersMStab = currentSpecification.FailureMechanismParametersMStab;
+                    damMacroStabilityKernelWrapper.FailureMechanismParametersMStab = currentSpecification.FailureMechanismParametersMStab.Copy();
                     break;
                 case FailureMechanismSystemType.Piping:
                     switch (currentSpecification.PipingModelType)