Are you still able to edit the query in query designer (not run/open it from a shortcut bar)
no, i got the error trying to edit it in query designer. I've tryed to run ist from a shortcut, bit i'll get the following error:
"Beim Aufruf der Ergebnisansicht ist das folgende Problem aufgetaucht, das den Vorgang undurchführbach macht: 0"
Probably means there is an attribute on that query that has a NULL value in the database. I had the same thing happen with a survey query I was trying to run. I had to go into the database and pull the table for which it was referencing, find the column and update any NULL values in there. It usually happens if you have an attribute that is an int16 or int32 that has no value associated with it.
I'd reference the database to see if you can find the culprit.
Hopefully Benedict will read your response ;-)
Regards from Germany