Index: dam clients/DamUI/trunk/src/Dam/Data/CsvExportData.cs
===================================================================
diff -u -r755 -r808
--- dam clients/DamUI/trunk/src/Dam/Data/CsvExportData.cs	(.../CsvExportData.cs)	(revision 755)
+++ dam clients/DamUI/trunk/src/Dam/Data/CsvExportData.cs	(.../CsvExportData.cs)	(revision 808)
@@ -2152,6 +2152,8 @@
 
         public bool IsVisible(string property)
         {
+            if (damFailureMechanismeCalculationSpecification == null)
+                return false;
             switch (property)
             {
                 // #Bka note that using FailureMechanismSystemType here is only possible as long as multiple specifications are NOT allowed. Otherwise visibility would