If you must :-) I personally hate seeing DO WHILE's anywhere near this OCX. Too easy to hang up the app. Have you watched the port using the suggested PortMon utility? If the count is going to zero without any additional help, one must assume it was sent. PortMon will show you exactly what was sent and when.

>Hi Jim, so, you are saying add a
>
>do while ThisForm.oleComm2.outBufferCount > 0
>enddo
> after the ..output = ..
>
>I have stepped thru the debugger while running this app. the outbuffercount goes to 0 and the conveyor still does not respond immediately.