My guess is that you'll find that the file "GLGROUP.DAT" is missing from the dataset. This file contains the default account ranges, and is maintained in Edit |Account Groups.

Interestingly, neither the Adagio, or ACCPAC Plus data Integrity Check functions notice this. ACCPAC Plus does notice if you try and start the General Ledger. Adagio does not. I can e-mail you an empty GLGROUP.dat if you need it.