Hi Carsten,
Could you send me the data file (otmar.foehner@ni.com) or upload the file here for testing?
Also, please tell us which version of DIAdem (click on the '?' in the menu bar, then on 'About ...') you are using.
I'll check it out as soon as I get the file from you.
Best regards,
Otmar
Otmar D. Foehner