printing report crashes NAS

I Have NAS running. Among other things, NAS invokes a report an should print it. Even though it prints fine when clicking on RUN REPORT manually, it never prints when running within NAS - even worse, the NAS service crashes and cannot be stopped within the Windows 2000 Service management any more. The only message I can see is in the Windows System log: Warning. Source: Print. The printer driver was reinstalled etc,. etc. Any clues/hints? This drives me crazy…

Do you have a form type variable defined somewhere in your report ? Are you using varaibles of the type Dialog ? This prevents a report from running in NAS.