That's a very strange comment from Teradyne, we probably need to sort out some point of confusion with them. There's no reason why changing your PC should require a different VXI-MXI-2. And the latest revision of the VXI-MXI-2 is rev. E. So you have nothing to worry about, but it sounds like we need to get in touch with Teradyne...
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Scot Salmon
National Instruments
VXI/PXI Senior Software Engineer