Index: DamClients/DamUI/trunk/src/DamClientsLibrary/Deltares.Dam.Data/CsvExportData.cs
===================================================================
diff -u -r3459 -r3525
--- DamClients/DamUI/trunk/src/DamClientsLibrary/Deltares.Dam.Data/CsvExportData.cs	(.../CsvExportData.cs)	(revision 3459)
+++ DamClients/DamUI/trunk/src/DamClientsLibrary/Deltares.Dam.Data/CsvExportData.cs	(.../CsvExportData.cs)	(revision 3525)
@@ -207,7 +207,7 @@
             {
                 if (!String.IsNullOrEmpty(BaseFileName))
                 {
-                    const string fileExtension = ".sti";
+                    const string fileExtension = ".stix";
 
                     string fullBaseFilename = DamProject.ProjectWorkingPath;
                     if (CalculationSubDir != "")
@@ -1688,7 +1688,7 @@
                         break;
                     case FailureMechanismSystemType.Piping:
                         res = PipingFactor;
-                        break;                    
+                        break;
                 }
                 return res;
             }
@@ -1717,7 +1717,7 @@
                         break;
                 }
                 return res;
-            }            
+            }
         }
 
         [Format("F3")]
@@ -1799,7 +1799,7 @@
             {
                 if (damFailureMechanismeCalculationSpecification.FailureMechanismSystemType == FailureMechanismSystemType.Piping)
                 {
-                    return damFailureMechanismeCalculationSpecification.PipingModelType;                    
+                    return damFailureMechanismeCalculationSpecification.PipingModelType;
                 }
                 return null;
             }
@@ -2043,50 +2043,46 @@
         /// <param name="extension">The extension.</param>
         private void CopyResultFile(string extension)
         {
-            string copyResFile = Path.GetDirectoryName(InputFile) + Path.DirectorySeparatorChar + Path.GetFileNameWithoutExtension(InputFile) + " (copy)" + extension;
+            string copyResFile = Path.GetDirectoryName(InputFile) + Path.DirectorySeparatorChar +
+                                 Path.GetFileNameWithoutExtension(InputFile) + " (copy)" + extension;
             var resFile = Path.ChangeExtension(InputFile, extension);
             if (resFile != null)
             {
                 File.Copy(resFile, copyResFile, true);
             }
         }
 
-        private string GetCurrentExeForOpenCalculationFile()
-        {
-            return DamHelperFunctions.MStabExePath;
-        }
-
         /// <summary>
         /// Opens the calculation file.
         /// </summary>
         public void OpenCalculationFile()
         {
             if (File.Exists(InputFile))
             {
-                string copyFile = Path.GetDirectoryName(InputFile) + Path.DirectorySeparatorChar + 
-                    Path.GetFileNameWithoutExtension(InputFile) + " (copy)" + Path.GetExtension(InputFile);
+                string copyFile = Path.GetDirectoryName(InputFile) + Path.DirectorySeparatorChar +
+                                  Path.GetFileNameWithoutExtension(InputFile) + " (copy)" +
+                                  Path.GetExtension(InputFile);
                 File.Copy(InputFile, copyFile, true);
-                var exeName = GetCurrentExeForOpenCalculationFile();
 
-                const string stdExtension = ".std";
-                CopyResultFile(stdExtension);
-
-                const string stoExtension = ".sto";
-                CopyResultFile(stoExtension);
-                
                 var process = new Process
                 {
-                    StartInfo =
+                    StartInfo = new ProcessStartInfo(copyFile)
                     {
-                        RedirectStandardOutput = false,
-                        FileName = exeName
+                        UseShellExecute = true,
+                        WindowStyle = ProcessWindowStyle.Normal
                     }
                 };
-                
-                process.StartInfo.Arguments = " \"" + copyFile + "\"";
-                process.StartInfo.UseShellExecute = false;
-                process.StartInfo.WindowStyle = ProcessWindowStyle.Normal;
-                process.Start();
+                try
+                {
+                    process.Start();
+                }
+                catch (Exception)
+                {
+                    var exceptionMessage = string.Format(
+                        "The file {0} could not be opened with D-Stability. Make sure files with the extension {1} are associated with D-Stability.",
+                        InputFile, Path.GetExtension(InputFile));
+                    throw new CsvExporterException(exceptionMessage);
+                }
             }
             else
             {
@@ -2109,7 +2105,9 @@
         public bool IsVisible(string property)
         {
             if (damFailureMechanismeCalculationSpecification == null)
+            {
                 return false;
+            }
             switch (property)
             {
                 case "StabilityModel":
@@ -2118,18 +2116,20 @@
                            damFailureMechanismeCalculationSpecification.FailureMechanismSystemType ==
                            FailureMechanismSystemType.StabilityOutside;
                 case "PipingModel":
-                    return damFailureMechanismeCalculationSpecification.FailureMechanismSystemType == FailureMechanismSystemType.Piping;
+                    return damFailureMechanismeCalculationSpecification.FailureMechanismSystemType ==
+                           FailureMechanismSystemType.Piping;
                 case "PipingFactor":
-                    return damFailureMechanismeCalculationSpecification.FailureMechanismSystemType == FailureMechanismSystemType.Piping;
+                    return damFailureMechanismeCalculationSpecification.FailureMechanismSystemType ==
+                           FailureMechanismSystemType.Piping;
                 case "HCritical":
-                    return damFailureMechanismeCalculationSpecification.FailureMechanismSystemType == FailureMechanismSystemType.Piping;
+                    return damFailureMechanismeCalculationSpecification.FailureMechanismSystemType ==
+                           FailureMechanismSystemType.Piping;
                 case "OpenCalculationFile":
-                    return damFailureMechanismeCalculationSpecification.FailureMechanismSystemType != FailureMechanismSystemType.Piping &&
-                           File.Exists(GetCurrentExeForOpenCalculationFile());
+                    return damFailureMechanismeCalculationSpecification.FailureMechanismSystemType !=
+                           FailureMechanismSystemType.Piping;
                 default:
                     return true;
             }
-
-        }        
+        }
     }
 }
\ No newline at end of file