Hello Sly, Are you, by chance, running on a Dell Dimension 4500 Slimline Series desktop (or similar model)? Due to limited PCI slots on some of these models, they require a PCI expander/splitter that allows for 2 PCI devices to be plugged into the same slot. You may have the GPIB card and the network interface card (NIC) connected to the same PCI slot. If this is the case, the NIC might stop working a well. This may be a system resource conflict issue. You should remove the network card (or any other card that may be sharing the same PCI slot) to fix this problem.
Please let me know if this particular situation applies to you. If not, post the applicable portions of your code and any other information that may be useful, and I=92ll be happy to look further into it. Have a nice day! Robert M Applications Engineer National Instruments
