Index: DamClients/DamUI/trunk/src/DamClientsLibrary/Deltares.Dam.Data/CsvExportData.cs
===================================================================
diff -u -r2089 -r2138
--- DamClients/DamUI/trunk/src/DamClientsLibrary/Deltares.Dam.Data/CsvExportData.cs	(.../CsvExportData.cs)	(revision 2089)
+++ DamClients/DamUI/trunk/src/DamClientsLibrary/Deltares.Dam.Data/CsvExportData.cs	(.../CsvExportData.cs)	(revision 2138)
@@ -2566,7 +2566,8 @@
                 case "HCritical":
                     return damFailureMechanismeCalculationSpecification.FailureMechanismSystemType == FailureMechanismSystemType.Piping;
                 case "OpenCalculationFile":
-                    return File.Exists(GetCurrentExeForOpenCalculationFile());
+                    return damFailureMechanismeCalculationSpecification.FailureMechanismSystemType != FailureMechanismSystemType.Piping &&
+                           File.Exists(GetCurrentExeForOpenCalculationFile());
                 default:
                     return true;
             }