AnsweredAssumed Answered

LabVIEW VISA Find Resource / GPIB Issue 3458a

Question asked by aaas on Aug 21, 2015
I can't get any readings or issue commands to my 3458a if I run VISA Find Resource first.  However, if I do a dummy read first then run VISA Find Resource, I can continue to use the 3458a without any problems.  Attached is copy of the code.  I'm looking to understand what is happening and how to fix it.  

Why can't I run the VISA Find Resource first?  Is there a line asserted/unasserted or device online/offline or something else?  My guess is there is a GPIB config problem but I could be wrong. :)   What other commands can I issue after the VISA Find Resource to get control of the 3458a? I'm using LabVIEW 2012 on a computer with Windows 7 Enterprise using a PXI-GPIB card.

Edited by: AAAS on Aug 21, 2015 5:29 PM