I have written a program for my company which manages invoices, stack and all similar things in VFP 5.0.

It is running OK on a single machine, however in Microsoft Network (peer-to-peer) sometimes problems appear. On user gets another user data on his invoice (while editing) etc. Staff reports that it usually happens while printing.

I use Buffering and Transactions for data storage.
Also check lock(), so two users can never edit the same record.
However, it happens in some way, that buffered data get to another machine.

How is it possible?

THANKS IN ADVANCED FOR