Adagio Ledger dictionaries in the \softrak\dict directory start with the characters @L. Perhaps try removing all of these files (not deleting, just in case) and reinstall Ledger. A possible problem is that the dictionary files have an invalid file date, and installing an upgrade is not able to put in the correct files.

If you are running the current version of Adagio Ledger 80D, the files are @L80AI.SSI (date May 8, 2006) and @L80AR (date May 9, 2006).

If your dictionaries are OK, then perhaps your data fails an integrity check?

When do you get the error? On opening the data, editing an account, creating a batch entry, printing a report, or otherwise?