Index: DamClients/DamUI/trunk/src/DamClientsLibrary/Deltares.Dam.Data/CsvExportData.cs
===================================================================
diff -u -r3433 -r3459
--- DamClients/DamUI/trunk/src/DamClientsLibrary/Deltares.Dam.Data/CsvExportData.cs	(.../CsvExportData.cs)	(revision 3433)
+++ DamClients/DamUI/trunk/src/DamClientsLibrary/Deltares.Dam.Data/CsvExportData.cs	(.../CsvExportData.cs)	(revision 3459)
@@ -1593,6 +1593,7 @@
         }
 
         [Browsable(false)]
+        [XmlIgnore]
         public List<StabilityResultSlice> ResultSlices { get; set; }
 
         [PropertyOrder(2, 1)]
Index: DamClients/DamUI/trunk/src/DamClientsLibrary/Deltares.Dam.Data/StabilityResultSlices.cs
===================================================================
diff -u -r3437 -r3459
--- DamClients/DamUI/trunk/src/DamClientsLibrary/Deltares.Dam.Data/StabilityResultSlices.cs	(.../StabilityResultSlices.cs)	(revision 3437)
+++ DamClients/DamUI/trunk/src/DamClientsLibrary/Deltares.Dam.Data/StabilityResultSlices.cs	(.../StabilityResultSlices.cs)	(revision 3459)
@@ -21,6 +21,7 @@
 
 using System.Collections.Generic;
 using Deltares.Mathematics;
+using System.Xml.Serialization;
 
 namespace Deltares.Dam.Data
 {
@@ -29,20 +30,23 @@
     /// </summary>
     public class StabilityResultSlices
     {
-        
+
         /// <summary>
         /// The list of all slices
         /// </summary>
+        [XmlIgnore]
         public List<StabilityResultSlice> StabilityResultSlice;
 
         /// <summary>
         /// The active center point
         /// </summary>
+        [XmlIgnore]
         public Point2D ActiveCenterPoint;
 
         /// <summary>
         /// The passive center point
         /// </summary>
+        [XmlIgnore]
         public Point2D PassiveCenterPoint;
     }
 }
Index: DamClients/DamUI/trunk/src/DamClientsLibrary/Deltares.Dam.Data/IO/VersionInfo.cs
===================================================================
diff -u -r2875 -r3459
--- DamClients/DamUI/trunk/src/DamClientsLibrary/Deltares.Dam.Data/IO/VersionInfo.cs	(.../VersionInfo.cs)	(revision 2875)
+++ DamClients/DamUI/trunk/src/DamClientsLibrary/Deltares.Dam.Data/IO/VersionInfo.cs	(.../VersionInfo.cs)	(revision 3459)
@@ -34,12 +34,29 @@
         /// FileVersion 1 is for version 19.1.1.</summary>
         /// FileVersion 2 is for version 20.1.1. and up</summary>
         public const int CurrentFileVersion = 2;
-        /// <summary>Current File Version.</summary>
-        /// <value>The file version.</value>
-        ///
-        /// 
-        public int FileVersion { get; set; } // Default is 0 and indicates the situation that FileVersion was not introduced yet
 
+        //#Bka: added this field to be able to debug the de-serialization of the file version info.
+        // I noticed that when the designresults are added to the serialization/de-serialization,
+        // this version info is not read any more, indicating a problem with the serialization/
+        // de-serialization of the design results. Set a breakpoint at the setter of the property
+        // and a breakpoint at "if (damProjectData != null)" in method OpenXMLProject in DamProject.
+        // Executing should always hit the line here first as fileversion should be read from the xml
+        // If it stops at the DamProject breakpoint first, you know serialization/de-serialization
+        // of the designresults is wrong.
+        private int fileVersion;
+
+        /// <summary>
+        /// Gets or sets the file version.
+        /// </summary>
+        /// <value>
+        /// The file version.
+        /// </value>
+        public int FileVersion
+        {
+            get { return fileVersion; }
+            set { fileVersion = value; }
+        } // Default is 0 and indicates the situation that FileVersion was not introduced yet
+
         /// <summary>Gets or sets the assembly name with which the input file is being created.</summary>
         /// <value>The program version.</value>
         ///