Hey Dave, The first thing I would suggest is upgrading to NI-VISA 3.1 to make sure your not running into any old VISA issues.
http://digital.ni.com/softlib.nsf/websearch/8E7D54CA3A1FDECF86256E4D007ED2E0?opendocument&node=132060_US In addition, here are some helpful links about setting this system up. http://digital.ni.com/public.nsf/websearch/80C28CC795611E4A86256AB100209521?OpenDocument http://digital.ni.com/public.nsf/websearch/D7D8E3E1B682022286256D4A00771A52?OpenDocument http://digital.ni.com/public.nsf/websearch/22F1F2ABC640D5BA86256CD1003BA06D?OpenDocument http://digital.ni.com/public.nsf/websearch/3DD043326CF5BF6786256C10005151DC?OpenDocument I'm not sure that GetInstrSession will return for a raw socket. The raw socket connections don't contain as much information as the instrument connections. The two methods that you have listed act differently. The first method you mention will only work on instruments that are VXI-11 compliant and the second method is designed for the instruments that don't support the TCP/IP instrument protocol. Sense both of your instruments seem to use VXI-11 I would recommend using the first method that you've listed. I hope this helps out. JoshuaP National Instruments
