John,
No, the manufacturer didn't included any software with the device, but the same error occurs with a modem, it occurs even if i don't attach any device to the port.

Thank you

>Joaquim,
>I can't reproduce the error with VFP6 or 7 on Win98 and Win2000. I only have modems on these com ports, though. Maybe it has something to do with the device? Didn't the manufacturer include any software for using it?
>
>>The error occurs when the program tries to open CommPort:
>>"mscomm1.PortOpen = .t."