I have a program running that uses the NI common 8.6.35.131 for things like AnalogMultiChannel Reader and I am trying to communitcate with an instrument using a GPIB-USB-HS. I looked at the example program that comes with Measurement and Automation Exporer and it requires the NI Common 8.6.20.131. If I change to that reference the previous code in my program does not work because of the different versions of the NI Common reference. Anyone ever run into this problem and if you have what can be done about it? Thanks.