Windows XP hangs and must be rebooted during LabVIEW 7 run

[Wasy]

When I execute my LabVIEW 7 VI it runs smoothly with no errors for a period of time. However, it randomly freezes the screen (Win XP) and I must reboot the operating system in order to resume control. It is possibly related to calls from the Instrument I/O Assistant to a serial (RS-232) device. Is there any known fix?

[mmeyer]

We have seen this problem when communicating with PCI devices that are not behaving well (intermittent bus error). The only cure for that was to eliminate the source of bus errors. We have also seen this when using interrupts on the PCI. This behaves better using VISA 3.1.