Index: src/Deltares.DSoilModel.Data/DSoilModelProject.cs
===================================================================
diff -u -r883 -r946
--- src/Deltares.DSoilModel.Data/DSoilModelProject.cs	(.../DSoilModelProject.cs)	(revision 883)
+++ src/Deltares.DSoilModel.Data/DSoilModelProject.cs	(.../DSoilModelProject.cs)	(revision 946)
@@ -1414,7 +1414,8 @@
         // Check the stress model for the given - set to None if not C-Phi or Su berekend
         private void CheckStrengthModelSoil(Soil soil)
         {
-            if (soil.ShearStrengthModel != ShearStrengthModel.CPhi && soil.ShearStrengthModel != ShearStrengthModel.CuCalculated && soil.ShearStrengthModel != ShearStrengthModel.CuCalculatedYield)
+            if (soil.ShearStrengthModel != ShearStrengthModel.CPhi && soil.ShearStrengthModel != ShearStrengthModel.CuCalculated && 
+                soil.ShearStrengthModel != ShearStrengthModel.CuCalculatedYield && soil.ShearStrengthModel != ShearStrengthModel.CPhiOrCuCalculated)
             {
                 soil.ShearStrengthModel = ShearStrengthModel.None;
                 LogManager.Add(new LogMessage(LogMessageType.Warning, this, string.Format(LocalizationManager.GetTranslatedText(this, "UnknownStrengthModel"), soil.Name)));