MAS 200 All receipt of good transaction give vendor error since we had a power outage how do I fix this

We use MAS 200. All of our receipt of good transactions and receipt of invoice transactions give a "not-on-file- vendor" error on all valid vendors every since we had a power outage how do I fix this?

Please don't tell me to contact someone else. I am the only support my company has at this time.

I can do whatever is needed as long as someone explains to me what to do.

I apprecaite your help