This is just an initial guess. Can you look at your application and see if my conjecture could be true?
I think if you open duplicate VISA sessions to a device (e.g., "GPIB::2"), we append a number to the duplicate sessions. So, perhaps you've opened (with VISA Open and the "duplicate session" input set to TRUE) "GPIB::2" 27 times. (Note that we're talking about LV 6i or later.)
Normally, you never need more than one session to a single GPIB device, so "duplicate session" should almost always be FALSE.
If that doesn't apply, then please explain more about what you are doing. Are you using VISA calls yourself, or are you using an instrument driver? Is the instrument driver written in LabVIEW, or does it wrap around a DLL?
If you were u
sing "duplicate session" set to TRUE, I'd like to know about why you think (or thought) you needed to set it.
I hope this helps.
