Hi Brandon . Thanks for your reply.

In the partcular site, there is a peer to peer sever and a Pc hanging off the server.
Both machiones run the software from a network drive
The serial port is used to open a till

Both have serial cards installed.
One machine has never failed
The Problem machine fails infrquently, might be onece a day or three times a week.
I suppose it could be a fauilty serial port, or a faulty Cable or a faulty serial card,Faulty Till or some issue
with the software
The major problem is that when I use MsComm32 to 'send' stuff down to open the Till,
it hangs ,is not trapped by a Tr Catch , and Processor goes to about 60%
It sounds to me as if its trying to send and not stopping when it has difficulty
Maybe there is a timeout or something in MSCOMM ??

Regards,
Gerard



>I use MSCOMM32.ocx extensively without failure on 98, XP, and Vista for bidirectional communication between computers via RF Transcievers. Are you sure this problem isn't limited to your comm port on your development machine?
>
>Are you using a USB Serial adapter or does your computer have a real comm port?
>
>Have you tried turning down or off FIFO buffers?