Index: DamClients/DamUI/trunk/src/DamClientsLibrary/Deltares.Dam.Data/Translations.xml
===================================================================
diff -u -r2826 -r2871
--- DamClients/DamUI/trunk/src/DamClientsLibrary/Deltares.Dam.Data/Translations.xml	(.../Translations.xml)	(revision 2826)
+++ DamClients/DamUI/trunk/src/DamClientsLibrary/Deltares.Dam.Data/Translations.xml	(.../Translations.xml)	(revision 2871)
@@ -596,4 +596,5 @@
   <Translation ID="HydroStatic" en-US="Hydrostatic" nl-NL="Hydrostatisch" />
   <Translation ID="SemiTimeDependent" en-US="Semi time dependent" nl-NL="Semi tijdsafhankelijk" />
   <Translation ID="ProjectType" en-US="Project Type" nl-NL="Semi tijdsafhankelijk" />
+  <Translation ID="OpenProjectWarningFileVersion_0" en-US="The project was created with an older version of DAM; the following parameters are not present anymore in Location but should be define in the location scenarios: Polder level, Head PL2, Head PL3 and Head PL4" nl-NL="Dit project is gemaakt met een oudere versie van DAM; de volgende parameters zijn niet meer aanwezig in Locatie en moeten worden gedefinieerd in de locatie scenarios: Polderpeil, Stijghoogte PL2, Stijghoogte PL3 and Stijghoogte PL4" />
 </Translations>
\ No newline at end of file
Index: DamClients/DamUI/trunk/src/Dam/Forms/DamPlugin.cs
===================================================================
diff -u -r2628 -r2871
--- DamClients/DamUI/trunk/src/Dam/Forms/DamPlugin.cs	(.../DamPlugin.cs)	(revision 2628)
+++ DamClients/DamUI/trunk/src/Dam/Forms/DamPlugin.cs	(.../DamPlugin.cs)	(revision 2871)
@@ -270,11 +270,22 @@
         {
             mainForm.RegisterNewFileHandler(this.NewProject);
 
-            mainForm.RegisterOpenFileHandler("damx", "DAMX Files (*.damx)|*.damx", this.damProject.OpenXMLProject);
+            mainForm.RegisterOpenFileHandler("damx", "DAMX Files (*.damx)|*.damx", OpenProject);
 
             mainForm.RegisterSaveFileHandler("damx", "DAMX Files (*.damx)|*.damx", this.damProject.SaveXMLProject);
         }
 
+        private object OpenProject(string fileName)
+        {
+            object damProjectData = this.damProject.OpenXMLProject(fileName);
+            if (LogManager.Messages.Count > 0)
+            {
+                string message = LocalizationManager.GetTranslatedText(this, "OpenProjectWarnings");
+                LocalizedMessageBox.ShowTranslatedText(message);
+            }
+            return damProjectData;
+        }
+
         private void ConfigurePropertyGrid()
         {
             var dpc = mainForm.DynamicPropertyControl;
Index: DamClients/DamUI/trunk/src/DamClientsLibrary/Deltares.Dam.Data/DamProject.cs
===================================================================
diff -u -r2865 -r2871
--- DamClients/DamUI/trunk/src/DamClientsLibrary/Deltares.Dam.Data/DamProject.cs	(.../DamProject.cs)	(revision 2865)
+++ DamClients/DamUI/trunk/src/DamClientsLibrary/Deltares.Dam.Data/DamProject.cs	(.../DamProject.cs)	(revision 2871)
@@ -35,6 +35,7 @@
 using Deltares.Standard;
 using Deltares.Standard.IO;
 using Deltares.Standard.IO.Xml;
+using Deltares.Standard.Language;
 using Deltares.Standard.Logging;
 
 namespace Deltares.Dam.Data
@@ -318,10 +319,11 @@
 
         private void ResolveBackwardCompatibility()
         {
-            if (DamProjectData.VersionInfo.FileVersionAsRead == 0)
+            if (DamProjectData.VersionInfo.FileVersionAsRead < DamProjectData.VersionInfo.FileVersion)
             {
-                XmlDocument xmlDocument = new XmlDocument();
-                xmlDocument.Load(this.ProjectFileName);
+                string message = LocalizationManager.GetTranslatedText(this, "OpenProjectWarningFileVersion_0");
+                LogManager.Messages.Add(new LogMessage(LogMessageType.Warning, DamProjectData, message));
+                BackwardCompatibility.Update(DamProjectData, this.ProjectFileName);
             }
         }
 
Index: DamClients/DamUI/trunk/src/Dam/Forms/Translations.xml
===================================================================
diff -u -r2588 -r2871
--- DamClients/DamUI/trunk/src/Dam/Forms/Translations.xml	(.../Translations.xml)	(revision 2588)
+++ DamClients/DamUI/trunk/src/Dam/Forms/Translations.xml	(.../Translations.xml)	(revision 2871)
@@ -54,6 +54,7 @@
   <Translation ID="CalculationAborted" en-US="Calculation aborted" nl-NL="Berekening is gestopt" />
   <Translation ID="CalculationFinished" en-US="Calculation finished" nl-NL="Berekening is voltooid" />
   <Translation ID="CalculationFailed" en-US="Calculation failed" nl-NL="Berekening is mislukt" />
+  <Translation ID="OpenProjectWarnings" en-US="There are issues when opening this file; look at the log." nl-NL="Er zijn meldingen bij het openen van dit bestand; bekijk de log." />
   <Translation ID="NewDamProjectDialogCaption" en-US="New project" nl-NL="Nieuw project" />
   <Translation ID="NewDamProjectDialogProjectSpecificationGroup" en-US="Project specification" nl-NL="Project specificatie" />    
   <Translation ID="NewDamProjectDialogCaptionDescription" en-US="Calculation type" nl-NL="Berekeningstype" />  
Index: DamClients/DamUI/trunk/src/DamClientsLibrary/Deltares.Dam.Data/IO/BackwardCompatibility.cs
===================================================================
diff -u
--- DamClients/DamUI/trunk/src/DamClientsLibrary/Deltares.Dam.Data/IO/BackwardCompatibility.cs	(revision 0)
+++ DamClients/DamUI/trunk/src/DamClientsLibrary/Deltares.Dam.Data/IO/BackwardCompatibility.cs	(revision 2871)
@@ -0,0 +1,54 @@
+// Copyright (C) Stichting Deltares 2019. All rights reserved.
+//
+// This file is part of the application DAM - Clients Library.
+//
+// DAM - UI is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+// 
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program. If not, see <http://www.gnu.org/licenses/>.
+//
+// All names, logos, and references to "Deltares" are registered trademarks of
+// Stichting Deltares and remain full property of Stichting Deltares at all times.
+// All rights reserved.
+
+using System.Xml;
+
+namespace Deltares.Dam.Data.IO
+{
+    public class BackwardCompatibility
+    {
+        public static void Update(DamProjectData damProjectData, string projectFileName)
+        {
+            XmlDocument xmlDocument = new XmlDocument();
+            xmlDocument.Load(projectFileName);
+            XmlElement rootElement = GetElement(xmlDocument, "Locations");
+
+        }
+
+        private static XmlElement GetElement(XmlNode parent, string name)
+        {
+            foreach (var xmlNode in parent.ChildNodes)
+            {
+                XmlElement element = xmlNode as XmlElement;
+                if (element != null)
+                {
+                    if (element.Name == name)
+                    {
+                        return element;
+                    }
+
+                }
+            }
+
+            return null;
+        }
+    }
+}
\ No newline at end of file
Index: DamClients/DamUI/trunk/src/DamClientsLibrary/Deltares.Dam.Data/Deltares.Dam.Data.csproj
===================================================================
diff -u -r2864 -r2871
--- DamClients/DamUI/trunk/src/DamClientsLibrary/Deltares.Dam.Data/Deltares.Dam.Data.csproj	(.../Deltares.Dam.Data.csproj)	(revision 2864)
+++ DamClients/DamUI/trunk/src/DamClientsLibrary/Deltares.Dam.Data/Deltares.Dam.Data.csproj	(.../Deltares.Dam.Data.csproj)	(revision 2871)
@@ -192,6 +192,7 @@
     <Compile Include="DamGlobalConstants.cs" />
     <Compile Include="DamHelperFunctions.cs" />
     <Compile Include="IAssignable.cs" />
+    <Compile Include="IO\BackwardCompatibility.cs" />
     <Compile Include="IO\DamProjectVersionXmlHandler.cs" />
     <Compile Include="IO\FailureMechanismeParamatersMStabXmlHandler.cs" />
     <Compile Include="IO\VersionInfo.cs" />