FYI - all the low 100 errors are related to key corruption within the data file itself. Usually, the data records are OK and can be read individually and written to a new copy of the data file with the freshly hashed key value and this corrects the problem. This is what *UFAR and Rebuild Key File utilities do. Not sure what exactly causes the original corruption, but this corrects the symptom. Luckily, it doesn't happen all that often....