Hi,
Background
I have a test system which is experiencing some problems with the VISA or GPIB communication.
The main exe-file dynamically loads and runs VIs to do the measurements, i.e all the HW communication is made from those VIs and NOT from the exe-file.
The measurements takes about 30 min and is executed once/day.
Sometimes there are communcation problem with the hardware when the program has been idling for a full day.
I use both NI VISA and NI488.2 drivers.
Problem
The NI488.2 driver does not (what I know of) have a function for sending the ibonl command, and I have seen that this is sent when the exe-file closes, and not the dynamically loaded VIs. Since the exe-file is not closed in between the measurements, the device handle becomes invalid and program crashes/hangs.
I've tried to using the gpib-32.dll for sending the ibonl command, but without success, does anyone know how to do that? Or better yet, have a wrapper for the DLL in LabVIEW?
/Andreas
