Index: DamEngine/trunk/src/Deltares.DamEngine.Interface/FillDamFromXmlInput.cs
===================================================================
diff -u -r1183 -r1188
--- DamEngine/trunk/src/Deltares.DamEngine.Interface/FillDamFromXmlInput.cs	(.../FillDamFromXmlInput.cs)	(revision 1183)
+++ DamEngine/trunk/src/Deltares.DamEngine.Interface/FillDamFromXmlInput.cs	(.../FillDamFromXmlInput.cs)	(revision 1188)
@@ -295,6 +295,7 @@
                 soil.SlopeRestProfile = inputSoil.SlopeRestProfileSpecified ? inputSoil.SlopeRestProfile : double.NaN;
                 soil.DilatancyType = inputSoil.DilatancyTypeSpecified ?
                     (DilatancyType?)ConversionHelper.ConvertToDilatancyType(inputSoil.DilatancyType) : null;
+                soil.SoilType = inputSoil.SoilTypeSpecified ? ConversionHelper.ConvertToSoilType(inputSoil.SoilType) : SoilType.Clay;
                 soils.Add(soil);
             }
         }
@@ -372,7 +373,9 @@
                     location.RwBankProtectionBottomLevel = assesmentRegionalOptions.RegionalBankProtectionBottomLevel;
                     location.DredgingDepth = assesmentRegionalOptions.DredgingDepth;
                     location.DetrimentFactor = assesmentRegionalOptions.DetrimentFactor;
-                    location.DikeMaterialType = ConversionHelper.ConvertToSoilType(assesmentRegionalOptions.DikeSoilType);
+                    location.DikeMaterialType = assesmentRegionalOptions.DikeSoilTypeSpecified ? 
+                        ConversionHelper.ConvertToSoilType(assesmentRegionalOptions.DikeSoilType) : 
+                        SoilType.Clay;
                 }
                 // Design options
                 var designOptions = inputLocation.DesignOptions;
Index: DamEngine/trunk/src/Deltares.DamEngine.Interface.Tests/FillDamFromXmlInputTests.cs
===================================================================
diff -u -r1165 -r1188
--- DamEngine/trunk/src/Deltares.DamEngine.Interface.Tests/FillDamFromXmlInputTests.cs	(.../FillDamFromXmlInputTests.cs)	(revision 1165)
+++ DamEngine/trunk/src/Deltares.DamEngine.Interface.Tests/FillDamFromXmlInputTests.cs	(.../FillDamFromXmlInputTests.cs)	(revision 1188)
@@ -189,6 +189,7 @@
                 soil.DiameterD90 = 20 + 0.1 * i;
                 soil.PermeabKx = 21 + 0.1 * i;
                 soil.WhitesConstant = 22 + 0.1 * i;
+                soil.SoilType = ConversionHelper.ConvertToSoilType(i);
 
                 dike.SoilList.Add(soil);
             }
Index: DamEngine/trunk/src/Deltares.DamEngine.Interface/FillXmlInputFromDam.cs
===================================================================
diff -u -r1183 -r1188
--- DamEngine/trunk/src/Deltares.DamEngine.Interface/FillXmlInputFromDam.cs	(.../FillXmlInputFromDam.cs)	(revision 1183)
+++ DamEngine/trunk/src/Deltares.DamEngine.Interface/FillXmlInputFromDam.cs	(.../FillXmlInputFromDam.cs)	(revision 1188)
@@ -252,6 +252,8 @@
                 {
                     inputSoil.DilatancyType = ConversionHelper.ConvertToSoilDilatancyType(soil.DilatancyType.Value);
                 }
+                inputSoil.SoilType = ConversionHelper.ConvertToInputSoilType(soil.SoilType);
+                inputSoil.SoilTypeSpecified = true;
                 inputSoils[i] = inputSoil;
             }
         }
@@ -330,6 +332,7 @@
                 assesmentRegionalOptions.DredgingDepth = location.DredgingDepth;
                 assesmentRegionalOptions.DetrimentFactor = location.DetrimentFactor;
                 assesmentRegionalOptions.DikeSoilType = ConversionHelper.ConvertToInputSoilType(location.DikeMaterialType);
+                assesmentRegionalOptions.DikeSoilTypeSpecified = true;
                 inputLocation.AssesmentRegionalOptions = assesmentRegionalOptions;
 
                 // Design options