>Hi Jim. I missed one of your responses: no handshake was used between the CNC and the old Fanuc DOS app.--which is behaving the same way since we moved from NT to Windows 2K. So I haven't set any handshake for this. The files are variable in size and a short file downloads and uploads fine. You're right, of course: the buffer was not being cleared. I am using VFP6, although I have the same results when I experiment in VFP8. Thanks again.

If you can, ZIP your form and email it to me. I still have too many questions that could be answered very quickly with a peek.