Index: DamTools/LayerOnSlopeTool/trunk/src/Deltares.LayerOnSlopeTool.Io/DamMStabDoc.cs
===================================================================
diff -u -r3141 -r3150
--- DamTools/LayerOnSlopeTool/trunk/src/Deltares.LayerOnSlopeTool.Io/DamMStabDoc.cs	(.../DamMStabDoc.cs)	(revision 3141)
+++ DamTools/LayerOnSlopeTool/trunk/src/Deltares.LayerOnSlopeTool.Io/DamMStabDoc.cs	(.../DamMStabDoc.cs)	(revision 3150)
@@ -412,19 +412,19 @@
     [System.Xml.Serialization.XmlRootAttribute(Namespace="", IsNullable=true)]
     public partial class tnsbPrefixTrafficLoad {
         
-        private string xCoordinateAtRiverField;
+        private double xCoordinateAtRiverField;
         
-        private string xCoordinateAtPolderField;
+        private double xCoordinateAtPolderField;
         
-        private string loadField;
+        private double loadField;
         
-        private string degreeOfConsolidationSpecified1Field;
+        private bool degreeOfConsolidationSpecified1Field;
         
-        private string degreeOfConsolidationField;
+        private double degreeOfConsolidationField;
         
         /// <remarks/>
         [System.Xml.Serialization.XmlAttributeAttribute()]
-        public string XCoordinateAtRiver {
+        public double XCoordinateAtRiver {
             get {
                 return this.xCoordinateAtRiverField;
             }
@@ -435,7 +435,7 @@
         
         /// <remarks/>
         [System.Xml.Serialization.XmlAttributeAttribute()]
-        public string XCoordinateAtPolder {
+        public double XCoordinateAtPolder {
             get {
                 return this.xCoordinateAtPolderField;
             }
@@ -446,7 +446,7 @@
         
         /// <remarks/>
         [System.Xml.Serialization.XmlAttributeAttribute()]
-        public string Load {
+        public double Load {
             get {
                 return this.loadField;
             }
@@ -457,7 +457,7 @@
         
         /// <remarks/>
         [System.Xml.Serialization.XmlAttributeAttribute("DegreeOfConsolidationSpecified")]
-        public string DegreeOfConsolidationSpecified1 {
+        public bool DegreeOfConsolidationSpecified1 {
             get {
                 return this.degreeOfConsolidationSpecified1Field;
             }
@@ -468,7 +468,7 @@
         
         /// <remarks/>
         [System.Xml.Serialization.XmlAttributeAttribute()]
-        public string DegreeOfConsolidation {
+        public double DegreeOfConsolidation {
             get {
                 return this.degreeOfConsolidationField;
             }
@@ -487,13 +487,13 @@
     [System.Xml.Serialization.XmlRootAttribute(Namespace="", IsNullable=true)]
     public partial class tnsbPrefixCalculationOptions {
         
-        private string minimalCircleDepthField;
+        private double minimalCircleDepthField;
         
-        private string zonesTypeField;
+        private ZonesType zonesTypeField;
         
         /// <remarks/>
         [System.Xml.Serialization.XmlAttributeAttribute()]
-        public string MinimalCircleDepth {
+        public double MinimalCircleDepth {
             get {
                 return this.minimalCircleDepthField;
             }
@@ -504,7 +504,7 @@
         
         /// <remarks/>
         [System.Xml.Serialization.XmlAttributeAttribute()]
-        public string ZonesType {
+        public ZonesType ZonesType {
             get {
                 return this.zonesTypeField;
             }
@@ -517,6 +517,21 @@
     /// <remarks/>
     [System.CodeDom.Compiler.GeneratedCodeAttribute("xsd", "4.8.3928.0")]
     [System.SerializableAttribute()]
+    public enum ZonesType {
+        
+        /// <remarks/>
+        NoZones,
+        
+        /// <remarks/>
+        ZoneAreas,
+        
+        /// <remarks/>
+        ForbiddenZone,
+    }
+    
+    /// <remarks/>
+    [System.CodeDom.Compiler.GeneratedCodeAttribute("xsd", "4.8.3928.0")]
+    [System.SerializableAttribute()]
     [System.Diagnostics.DebuggerStepThroughAttribute()]
     [System.ComponentModel.DesignerCategoryAttribute("code")]
     [System.Xml.Serialization.XmlTypeAttribute(AnonymousType=true)]
Index: DamTools/LayerOnSlopeTool/trunk/src/Deltares.LayerOnSlopeTool.Io/FillIoDamMStabDocFromXml.cs
===================================================================
diff -u -r3146 -r3150
--- DamTools/LayerOnSlopeTool/trunk/src/Deltares.LayerOnSlopeTool.Io/FillIoDamMStabDocFromXml.cs	(.../FillIoDamMStabDocFromXml.cs)	(revision 3146)
+++ DamTools/LayerOnSlopeTool/trunk/src/Deltares.LayerOnSlopeTool.Io/FillIoDamMStabDocFromXml.cs	(.../FillIoDamMStabDocFromXml.cs)	(revision 3150)
@@ -39,9 +39,26 @@
             TransferSurfaceLine(xmlMStabDamDoc.tnsPrefixDamMStabInput.tnsbPrefixSurfaceLine, ioMStabDamDoc.MStabInput.SurfaceLine);
             TransferCharacteristicPoints(xmlMStabDamDoc.tnsPrefixDamMStabInput.tnsbPrefixCharacteristicPoints, ioMStabDamDoc.MStabInput.CharacteristicPoints);
             TransferPlLines(xmlMStabDamDoc.tnsPrefixDamMStabInput.tnsbPrefixExternalPLLines, ioMStabDamDoc.MStabInput.ExternalPlLines);
+            TransferCalculationOptions(xmlMStabDamDoc.tnsPrefixDamMStabInput.tnsbPrefixCalculationOptions, ioMStabDamDoc.MStabInput.CalculationOptions);
+            TransferTrafficLoad(xmlMStabDamDoc.tnsPrefixDamMStabInput.tnsbPrefixTrafficLoad, ioMStabDamDoc.MStabInput.TrafficLoad);
             return ioMStabDamDoc;
         }
 
+        private static void TransferTrafficLoad(tnsbPrefixTrafficLoad xmlTrafficLoad, IoTrafficLoad ioTrafficLoad)
+        {
+            ioTrafficLoad.XCoordinateAtPolder = xmlTrafficLoad.XCoordinateAtPolder;
+            ioTrafficLoad.DegreeOfConsolidationSpecified = xmlTrafficLoad.DegreeOfConsolidationSpecified1;
+            ioTrafficLoad.DegreeOfConsolidation = xmlTrafficLoad.DegreeOfConsolidation;
+            ioTrafficLoad.Load = xmlTrafficLoad.Load;
+            ioTrafficLoad.XCoordinateAtRiver = xmlTrafficLoad.XCoordinateAtRiver;
+        }
+
+        private static void TransferCalculationOptions(tnsbPrefixCalculationOptions xmlCalculationOptions, IoCalculationOptions ioCalculationOptions)
+        {
+            ioCalculationOptions.MinimalCircleDepth = xmlCalculationOptions.MinimalCircleDepth;
+            ioCalculationOptions.ZonesType = xmlCalculationOptions.ZonesType;
+        }
+
         private static void TransferPlLines(tnsbPrefixExternalPLLinesTnsbPrefixPLLine[] xmlPlLines, List<IoPlLine> ioPlLines)
         {
             for (int plLineIndex = 0; plLineIndex < xmlPlLines.Length; plLineIndex++)
Index: DamTools/LayerOnSlopeTool/trunk/xsd/DamMStabDefinitions.xsd
===================================================================
diff -u -r3141 -r3150
--- DamTools/LayerOnSlopeTool/trunk/xsd/DamMStabDefinitions.xsd	(.../DamMStabDefinitions.xsd)	(revision 3141)
+++ DamTools/LayerOnSlopeTool/trunk/xsd/DamMStabDefinitions.xsd	(.../DamMStabDefinitions.xsd)	(revision 3150)
@@ -57,17 +57,17 @@
   </xs:element>
   <xs:element name="tnsbPrefixTrafficLoad" nillable="true">
     <xs:complexType>
-      <xs:attribute name="XCoordinateAtRiver" type="xs:string" use="optional" />
-      <xs:attribute name="XCoordinateAtPolder" type="xs:string" use="optional" />
-      <xs:attribute name="Load" type="xs:string" use="optional" />
-      <xs:attribute name="DegreeOfConsolidationSpecified" type="xs:string" use="optional" />
-      <xs:attribute name="DegreeOfConsolidation" type="xs:string" use="optional" />
+      <xs:attribute name="XCoordinateAtRiver" type="xs:double" use="required" />
+      <xs:attribute name="XCoordinateAtPolder" type="xs:double" use="required" />
+      <xs:attribute name="Load" type="xs:double" use="required" />
+      <xs:attribute name="DegreeOfConsolidationSpecified" type="xs:boolean" use="required" />
+      <xs:attribute name="DegreeOfConsolidation" type="xs:double" use="required" />
     </xs:complexType>
   </xs:element>
   <xs:element name="tnsbPrefixCalculationOptions" nillable="true">
     <xs:complexType>
-      <xs:attribute name="MinimalCircleDepth" type="xs:string" use="optional" />
-      <xs:attribute name="ZonesType" type="xs:string" use="optional" />
+      <xs:attribute name="MinimalCircleDepth" type="xs:double" use="required" />
+      <xs:attribute name="ZonesType" type="ZonesType" use="required" />
     </xs:complexType>
   </xs:element>
   <xs:element name="tnsbPrefixGeometryCreationOptions">
@@ -169,4 +169,11 @@
       <xs:enumeration value="Specified" />
     </xs:restriction>
   </xs:simpleType>
+  <xs:simpleType name="ZonesType">
+    <xs:restriction base="xs:string">
+      <xs:enumeration value="NoZones" />
+      <xs:enumeration value="ZoneAreas" />
+      <xs:enumeration value="ForbiddenZone" />
+    </xs:restriction>
+  </xs:simpleType>
 </xs:schema>
\ No newline at end of file
Index: DamTools/LayerOnSlopeTool/trunk/src/Deltares.LayerOnSlopeTool.Io/FillXmlDamMStabDocFromIo.cs
===================================================================
diff -u -r3146 -r3150
--- DamTools/LayerOnSlopeTool/trunk/src/Deltares.LayerOnSlopeTool.Io/FillXmlDamMStabDocFromIo.cs	(.../FillXmlDamMStabDocFromIo.cs)	(revision 3146)
+++ DamTools/LayerOnSlopeTool/trunk/src/Deltares.LayerOnSlopeTool.Io/FillXmlDamMStabDocFromIo.cs	(.../FillXmlDamMStabDocFromIo.cs)	(revision 3150)
@@ -56,9 +56,30 @@
                 new tnsbPrefixExternalPLLinesTnsbPrefixPLLine[ioMStabDamDoc.MStabInput.ExternalPlLines.Count];
             TransferPlLines(ioMStabDamDoc.MStabInput.ExternalPlLines, xmlDamMStabDoc.tnsPrefixDamMStabInput.tnsbPrefixExternalPLLines);
 
+            xmlDamMStabDoc.tnsPrefixDamMStabInput.tnsbPrefixCalculationOptions = new tnsbPrefixCalculationOptions();
+            TransferCalculationOptions(ioMStabDamDoc.MStabInput.CalculationOptions, xmlDamMStabDoc.tnsPrefixDamMStabInput.tnsbPrefixCalculationOptions);
+
+            xmlDamMStabDoc.tnsPrefixDamMStabInput.tnsbPrefixTrafficLoad = new tnsbPrefixTrafficLoad();
+            TransferTrafficLoad(ioMStabDamDoc.MStabInput.TrafficLoad, xmlDamMStabDoc.tnsPrefixDamMStabInput.tnsbPrefixTrafficLoad);
+
             return xmlDamMStabDoc;
         }
 
+        private static void TransferTrafficLoad(IoTrafficLoad ioTrafficLoad, tnsbPrefixTrafficLoad xmlTrafficLoad)
+        {
+            xmlTrafficLoad.XCoordinateAtRiver = ioTrafficLoad.XCoordinateAtRiver;
+            xmlTrafficLoad.XCoordinateAtPolder = ioTrafficLoad.XCoordinateAtPolder;
+            xmlTrafficLoad.DegreeOfConsolidationSpecified1 = ioTrafficLoad.DegreeOfConsolidationSpecified;
+            xmlTrafficLoad.DegreeOfConsolidation = ioTrafficLoad.DegreeOfConsolidation;
+            xmlTrafficLoad.Load = ioTrafficLoad.Load;
+        }
+
+        private static void TransferCalculationOptions(IoCalculationOptions iocalculationOptions, tnsbPrefixCalculationOptions xmlCalculationOptions)
+        {
+            xmlCalculationOptions.MinimalCircleDepth = iocalculationOptions.MinimalCircleDepth;
+            xmlCalculationOptions.ZonesType = iocalculationOptions.ZonesType;
+        }
+
         private static void TransferPlLines(List<IoPlLine> ioPlLines, tnsbPrefixExternalPLLinesTnsbPrefixPLLine[] xmlPlLines)
         {
             for (int plLineIndex = 0; plLineIndex < ioPlLines.Count; plLineIndex++)
Index: DamTools/LayerOnSlopeTool/trunk/src/Deltares.LayerOnSlopeTool.Io/IoTrafficLoad.cs
===================================================================
diff -u -r3117 -r3150
--- DamTools/LayerOnSlopeTool/trunk/src/Deltares.LayerOnSlopeTool.Io/IoTrafficLoad.cs	(.../IoTrafficLoad.cs)	(revision 3117)
+++ DamTools/LayerOnSlopeTool/trunk/src/Deltares.LayerOnSlopeTool.Io/IoTrafficLoad.cs	(.../IoTrafficLoad.cs)	(revision 3150)
@@ -21,8 +21,30 @@
 
 namespace Deltares.LayerOnSlopeTool.Io
 {
+    /// <summary>Traffic Load Type</summary>
     public class IoTrafficLoad
     {
-        
+        /// <summary>Gets or sets the x coordinate at river.</summary>
+        /// <value>The x coordinate at river.</value>
+        public double XCoordinateAtRiver { get; set; }
+
+        /// <summary>Gets or sets the x coordinate at polder.</summary>
+        /// <value>The x coordinate at polder.</value>
+        public double XCoordinateAtPolder { get; set; }
+
+        /// <summary>Gets or sets the load.</summary>
+        /// <value>The load.</value>
+        public double Load { get; set; }
+
+        /// <summary>Gets or sets a value indicating whether [degree of consolidation specified].</summary>
+        /// <value>
+        ///   <c>true</c> if [degree of consolidation specified]; otherwise, <c>false</c>.</value>
+        public bool DegreeOfConsolidationSpecified { get; set; }
+
+        /// <summary>Gets or sets the degree of consolidation.</summary>
+        /// <value>The degree of consolidation.</value>
+        public double DegreeOfConsolidation { get; set; }
+
+
     }
 }
\ No newline at end of file
Index: DamTools/LayerOnSlopeTool/trunk/src/Deltares.LayerOnSlopeTool.Io.Tests/IoDamMStabDocSeriliazerTests.cs
===================================================================
diff -u -r3146 -r3150
--- DamTools/LayerOnSlopeTool/trunk/src/Deltares.LayerOnSlopeTool.Io.Tests/IoDamMStabDocSeriliazerTests.cs	(.../IoDamMStabDocSeriliazerTests.cs)	(revision 3146)
+++ DamTools/LayerOnSlopeTool/trunk/src/Deltares.LayerOnSlopeTool.Io.Tests/IoDamMStabDocSeriliazerTests.cs	(.../IoDamMStabDocSeriliazerTests.cs)	(revision 3150)
@@ -69,10 +69,27 @@
             FillSurfaceLine(ioMStabDamDoc.MStabInput.SurfaceLine, xLeftBoundary, xRightBoundary);
             FillCharacteristicPoints(ioMStabDamDoc.MStabInput.CharacteristicPoints, xLeftBoundary, xRightBoundary);
             FillPlLines(ioMStabDamDoc.MStabInput.ExternalPlLines, xRightBoundary, xLeftBoundary, yDeep);
+            FillCalculationOptions(ioMStabDamDoc.MStabInput.CalculationOptions);
+            FillTrafficLoad(ioMStabDamDoc.MStabInput.TrafficLoad);
 
             return ioMStabDamDoc;
         }
 
+        private void FillTrafficLoad(IoTrafficLoad trafficLoad)
+        {
+            trafficLoad.XCoordinateAtRiver = 5.2;
+            trafficLoad.XCoordinateAtPolder = 5.7;
+            trafficLoad.DegreeOfConsolidationSpecified = true;
+            trafficLoad.DegreeOfConsolidation = 10.0;
+            trafficLoad.Load = 5.0;
+        }
+
+        private void FillCalculationOptions(IoCalculationOptions calculationOptions)
+        {
+            calculationOptions.MinimalCircleDepth = 0.75;
+            calculationOptions.ZonesType = ZonesType.ForbiddenZone;
+        }
+
         private static void FillPlLines(List<IoPlLine> plLines, double xRightBoundary, double xLeftBoundary, double yDeep)
         {
             var pl1 = new IoPlLine();
Index: DamTools/LayerOnSlopeTool/trunk/src/Deltares.LayerOnSlopeTool.StiFileCreator/StiFileCreator.cs
===================================================================
diff -u -r3149 -r3150
--- DamTools/LayerOnSlopeTool/trunk/src/Deltares.LayerOnSlopeTool.StiFileCreator/StiFileCreator.cs	(.../StiFileCreator.cs)	(revision 3149)
+++ DamTools/LayerOnSlopeTool/trunk/src/Deltares.LayerOnSlopeTool.StiFileCreator/StiFileCreator.cs	(.../StiFileCreator.cs)	(revision 3150)
@@ -45,7 +45,8 @@
             int result = mStabDAMInterface.CreateProjectFile(xmlString);
             if (result != 0)
             {
-                throw new Exception(String.Format("Error {0} in DGSMStabDamDll.CreateProjectFile()", result));
+                string errorMessage = mStabDAMInterface.ErrorMessage();
+                throw new Exception(String.Format("Error {0} in DGSMStabDamDll.CreateProjectFile(): '{1}'", result, errorMessage));
             }
         }
 
Index: DamTools/LayerOnSlopeTool/trunk/src/Deltares.LayerOnSlopeTool.Io/IoCalculationOptions.cs
===================================================================
diff -u -r3117 -r3150
--- DamTools/LayerOnSlopeTool/trunk/src/Deltares.LayerOnSlopeTool.Io/IoCalculationOptions.cs	(.../IoCalculationOptions.cs)	(revision 3117)
+++ DamTools/LayerOnSlopeTool/trunk/src/Deltares.LayerOnSlopeTool.Io/IoCalculationOptions.cs	(.../IoCalculationOptions.cs)	(revision 3150)
@@ -21,8 +21,15 @@
 
 namespace Deltares.LayerOnSlopeTool.Io
 {
+    /// <summary>Zones Type</summary>
     public class IoCalculationOptions
     {
-        
+        /// <summary>Gets or sets the minimal circle depth.</summary>
+        /// <value>The minimal circle depth.</value>
+        public double MinimalCircleDepth { get; set; }
+
+        /// <summary>Gets or sets the type of the zones.</summary>
+        /// <value>The type of the zones.</value>
+        public ZonesType ZonesType { get; set; }
     }
 }
\ No newline at end of file