DataCare was probably complaining about invalid (unprintable) characters in the deduction field. This type of error is usually caused by a hardware failure (NIC, wiring, controller card etc.) or power problem. Just keep on the lookout for this occurring again (sometimes they are just intermittent).

Glad we could help!

P.S. Is there a reason you chose to be setting up a new DOS system rather than Windows with Adagio? Why not take in one of the webinars?