Index: DamClients/DamUI/trunk/src/Dam/Data/DamEngineIo/FillXmlInputFromDamUi.cs
===================================================================
diff -u -r1267 -r1270
--- DamClients/DamUI/trunk/src/Dam/Data/DamEngineIo/FillXmlInputFromDamUi.cs	(.../FillXmlInputFromDamUi.cs)	(revision 1267)
+++ DamClients/DamUI/trunk/src/Dam/Data/DamEngineIo/FillXmlInputFromDamUi.cs	(.../FillXmlInputFromDamUi.cs)	(revision 1270)
@@ -328,6 +328,8 @@
                 waternetOptions.PhreaticLineCreationMethod = ConversionHelper.ConvertToInputPhreaticLineCreationMethod(location.PLLineCreationMethod);
                 waternetOptions.IntrusionVerticalWaterPressure = ConversionHelper.ConvertToInputIntrusionVerticalWaterPressure(location.IntrusionVerticalWaterPressure ?? IntrusionVerticalWaterPressureType.Standard);
                 waternetOptions.PolderLevel = location.PolderLevel;
+                waternetOptions.PolderLevelLow = location.PolderLevelLow;
+                waternetOptions.PolderLevelLowSpecified = true;
                 waternetOptions.DampingFactorPL3 = location.DampingFactorPL4;
                 waternetOptions.DampingFactorPL4 = location.DampingFactorPL3;
                 waternetOptions.PenetrationLength = location.PenetrationLength;
Index: DamClients/DamUI/trunk/src/Dam/Data/DamEngineIo/FillDamUiFromXmlInput.cs
===================================================================
diff -u -r1267 -r1270
--- DamClients/DamUI/trunk/src/Dam/Data/DamEngineIo/FillDamUiFromXmlInput.cs	(.../FillDamUiFromXmlInput.cs)	(revision 1267)
+++ DamClients/DamUI/trunk/src/Dam/Data/DamEngineIo/FillDamUiFromXmlInput.cs	(.../FillDamUiFromXmlInput.cs)	(revision 1270)
@@ -273,6 +273,8 @@
                 location.PLLineCreationMethod = ConversionHelper.ConvertToPhreaticLineCreationMethod(waternetOptions.PhreaticLineCreationMethod);
                 location.IntrusionVerticalWaterPressure = ConversionHelper.ConvertToIntrusionVerticalWaterPressure(waternetOptions.IntrusionVerticalWaterPressure);
                 location.PolderLevel = waternetOptions.PolderLevel;
+                location.PolderLevelLow = waternetOptions.PolderLevelLow;
+                // waternetOptions.PolderLevelLowSpecified is not used because the value is not a nullable
                 location.DampingFactorPL4 = waternetOptions.DampingFactorPL3;
                 location.DampingFactorPL3 = waternetOptions.DampingFactorPL4;
                 location.PenetrationLength = waternetOptions.PenetrationLength;
@@ -302,16 +304,18 @@
                 // Regional settings
                 location.DikeTableHeight = inputLocation.DikeTableHeight;
                 var assesmentRegionalOptions = inputLocation.AssesmentRegionalOptions;
-                location.BoezemLevelHbp = assesmentRegionalOptions.BoezemLevelHbp;
-                location.BoezemLevelLbp = assesmentRegionalOptions.BoezemLevelLbp;
-                location.BoezemLevelTp = assesmentRegionalOptions.BoezemLevelTp;
-                location.RwBankProtectionBottomLevel = assesmentRegionalOptions.RegionalBankProtectionBottomLevel;
-                location.DredgingDepth = assesmentRegionalOptions.DredgingDepth;
-                location.DetrimentFactor = assesmentRegionalOptions.DetrimentFactor;
-                location.DikeMaterialType = assesmentRegionalOptions.DikeSoilTypeSpecified ?
-                    ConversionHelper.ConvertToSoilType(assesmentRegionalOptions.DikeSoilType) :
-                    SoilType.Clay;
-
+                if (assesmentRegionalOptions != null)
+                {
+                    location.BoezemLevelHbp = assesmentRegionalOptions.BoezemLevelHbp;
+                    location.BoezemLevelLbp = assesmentRegionalOptions.BoezemLevelLbp;
+                    location.BoezemLevelTp = assesmentRegionalOptions.BoezemLevelTp;
+                    location.RwBankProtectionBottomLevel = assesmentRegionalOptions.RegionalBankProtectionBottomLevel;
+                    location.DredgingDepth = assesmentRegionalOptions.DredgingDepth;
+                    location.DetrimentFactor = assesmentRegionalOptions.DetrimentFactor;
+                    location.DikeMaterialType = assesmentRegionalOptions.DikeSoilTypeSpecified ?
+                                                    ConversionHelper.ConvertToSoilType(assesmentRegionalOptions.DikeSoilType) :
+                                                    SoilType.Clay;
+                }
                 SurfaceLine2 surfaceLine = dikeSurfaceLines.First(n => n.Name.Equals(inputLocation.SurfaceLineName));
                 location.LocalXZSurfaceLine2 = surfaceLine;
 
Index: DamClients/DamUI/trunk/src/Dam/Tests/DamEngineIo/FillXmlInputFromDamUiTests.cs
===================================================================
diff -u -r1267 -r1270
--- DamClients/DamUI/trunk/src/Dam/Tests/DamEngineIo/FillXmlInputFromDamUiTests.cs	(.../FillXmlInputFromDamUiTests.cs)	(revision 1267)
+++ DamClients/DamUI/trunk/src/Dam/Tests/DamEngineIo/FillXmlInputFromDamUiTests.cs	(.../FillXmlInputFromDamUiTests.cs)	(revision 1270)
@@ -191,6 +191,7 @@
                 location.PLLineCreationMethod = (PLLineCreationMethod) i;
                 location.IntrusionVerticalWaterPressure = (IntrusionVerticalWaterPressureType) i;
                 location.PolderLevel = 1.0 * i + 0.11;
+                location.PolderLevelLow = 1.0 * i + 0.09;
                 location.DampingFactorPL4 = 1.0 * i + 0.12;
                 location.DampingFactorPL3 = 1.0 * i + 0.13;
                 location.PenetrationLength = 1.0 * i + 0.14;
Index: DamEngine/trunk/src/Deltares.DamEngine.Interface/ConversionHelper.cs
===================================================================
diff -u -r1227 -r1270
--- DamEngine/trunk/src/Deltares.DamEngine.Interface/ConversionHelper.cs	(.../ConversionHelper.cs)	(revision 1227)
+++ DamEngine/trunk/src/Deltares.DamEngine.Interface/ConversionHelper.cs	(.../ConversionHelper.cs)	(revision 1270)
@@ -620,7 +620,6 @@
             return translationTable[validationResultMessageType];
         }
 
-
         /// <summary>
         /// The input grid type automatic
         /// </summary>
@@ -669,7 +668,6 @@
             return translationTable[shearStrengthModel];                
         }
             
-
         /// <summary>
         /// Converts to grid determination.
         /// </summary>