Index: DamClients/DamUI/trunk/src/DamClientsLibrary/Deltares.Dam.Data/DamProject.cs
===================================================================
diff -u -r6295 -r6310
--- DamClients/DamUI/trunk/src/DamClientsLibrary/Deltares.Dam.Data/DamProject.cs	(.../DamProject.cs)	(revision 6295)
+++ DamClients/DamUI/trunk/src/DamClientsLibrary/Deltares.Dam.Data/DamProject.cs	(.../DamProject.cs)	(revision 6310)
@@ -297,7 +297,10 @@
             if (damProjectData != null)
             {
                 damProjectData.VersionInfo.InitVersionInfoAfterRead();
-                
+                if (damProjectData.VersionInfo.FileVersionAsRead < damProjectData.VersionInfo.FileVersion)
+                {
+                    throw new DamProjectException(LocalizationManager.GetTranslatedText(GetType(), "CanNotReadOldFile"));
+                }
                 string damProjectVersion = damProjectVersionXmlHandler.GetDamProjectVersion();
                 damProjectVersion = GetMainVersion(damProjectVersion);
                 if (damProjectVersion != null)