Thank you very much for the feedback.
Could you please tell me how to update the text based on a lookup in a dataset?
As I wrote, I want to change an "id" (number) in a dataset, and translate that to a description in another dataset.
It works in the Report Designer, and I was (of cause) expecting it to work in the Report Viewer as well.
Is it possible to get the "Formattet" property and change the group text? Or is the formattet text (based on a lookup) not available in the event?
Please confirm, that your