I have an issue on one of my test sets where the GPIB is hanging for a few seconds and then resumes. This happens intermittently and only on one of my 7 test sets (all of them identical). I have 6 instruments connected with GPIB and all of the instruments hang during this time. I'm running WinXP Pro and LabVIEW 8.6.1 (I know, it's a little out dated). NI_VISA version is 4.4. I've been using this test set for years and now all of the sudden, I'm getting this issue. I've swapped PC, did not fix it. I've swapped several instruments thinking it could have been one of them, but that did not fix it either. I've run NI Spy and it confirms that there are no GPIB calls made during this freezing issue. I'm at a lose, any suggestions?
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