Hi Mike
My guess would be that that this is not VFP. The code is too common for it to have gone unnoticed for so long. I think you will find this to be the network itself not reporting/registering the existence of the file fast enough...I am assuming that the Copy To is to a network drive? If it is then I suggest to write a simple program on the PC with the problem to test for local file creation errors in order to eliminate the PC itself.
In the End, we will remember not the words of our enemies, but the silence of our friends - Martin Luther King, Jr.