Hi. I have a really strange problem at one client site. The client is running a peer to peer Windows XP Pro network. The app is VFP 7.0 Here's what is happening.

In the app you can enter a value in a screen. (Payment method - a cheque amount). When you do the system checks a field on the same table and if empty inserts a record in another table (Receipt) and shows that record (ok so far) and updates the parent record with the key (doesnt happen), then you come back to the main screen and are moved to a field to enter a cheque number. The client does and the code requires that it find the record just stored and replace the cheque number (previously empty) with the one just entered. Then the client saves the record. When all is said and done, the receipt was created, the parent record did not record the receipt key so the cheque number is never recorded. I have other clients using this code without issue. I can use the client's data and press the exact same keystrokes and no problem occurs. This client also has a problem in other areas such as data 'disappearing' after a save.(screen goes blank, possible index corruption), going next/previous in a screen and wrong values come up, posting and account numbers not captured. All in all there is alot of wierd stuff happening, but only at this site. I have other clients running the app, I can do the exact keystrokes using the clients data without issue. The problems occur when no one else is in the application, and when done directly on the main computer (acting as a server, where the data/program resides). I thought about opportunistic locking, but I thought Win XP defaulted it off by design. All the problems seem to relate to buffering, but the same 'code' is executed at multiple sites so I cant see it being the program itself - some wierd environmental issue. Any words of advice?

TIA,
Sandi.