Bruce,
FWIW, my client's machines were all Win95, the app was medium-sized, VFP5 SP3. After he replaced the cables and network hubs he had no further problems.

>This is an extremely peculiar and nasty problem, at least for me. I think it's an odd mixture of network and local account configuration, and possibly something as you suggest with hardware. It also could be AV-related, but I cannot do anything about if it is, so am ignoring that, pretty much. It does still occur with AV temporarily disabled, anyway. Only seen it under NT4 SPs 4 to 6, never a problem with 95/98. I have two accounts on an NT4WS machine, a network and a local admin, either can connect to network. Here is the pattern of ISOs (I bring this up because I thought I had problem licked, but it has returned).