Here's what you'd need to provide to tell me for sure: - The hardware configuration, for example, the GPIB controller board number - The instrument address - The resource string you are using - Whether the instrument appears in our tools like MAX or VISAIC
But I've got a couple of ideas based on the error code. It's suggesting that you're trying to use something like "GPIB2::..." when in fact your GPIB controller is configured as board number 0. It could also mean that it can't find the GPIB library installed on your system. NI-VISA doesn't handle GPIB communications intrinsically, it needs NI-488. Hope this helps, Dan Mondrik National Instruments
