It sounds like the file containing your statement groups is damaged (based on your other post). In your data directory using explorer with the financial reporter closed, rename the file GLRPTGRP.dat to GLRPTGRP.HID (for hidden) and relaunch the financial reporter. You should have an empty report group tree. If you had a lot of report groups set up, then you can restore this file from some earlier backup.

If you are uncomfortable in renaming a file using explorer, then your Adagio consultant should be able to help.