John,

Do you use TRANSACTIONs in this app?

What RAM and what OS is the "server" running?

I find it hard to believe that turning OFF disk cache would give you errors. You turned it off on all machines?... You turned it off for each HD on EACH system?...You turned it off while nothing was running on the PC except the OS and its services?

Is there any possibility that other things are run on the "server" while the app is running?

Finally, is it possible to try running with only 5 or less workstations attached? I believe that 9 may be too close to the limit of peer-to-peer capabilities.

good luck.

>Hi,
>
>>>what server/client OS you use ?
>WINXP Home/Pro only network with VFP native database
>
>>>what Visual FoxPro version you use ?
>VFP6 SP5
>
>>>number of concurent users ?
>9 PCs including server
>
>>>-switching off server disk cache
>We tried to off the disk cache, but it will cause harddisk error.
>
>Any other suggestion?
>
>Thank you