MAX sees device but VISA does not

[rfults]

I have installed a new GPIB card in a PC which already had 2 LAN GPIB cards that it was communicating with.  MAX sees the new installed GPIB card, but VISA does not.   The software is using VISA commands, and therefore can't communicate with the devices connected to the new card. 

I have re-installed NI-VISA 3.3 and NI-488 2.30 in hopes that it was a configuration issue, but it did not help.    Any ideas?

[LoganS]

What do you mean VISA doesn't see it?  When you try to communicate with it, what kind of errors are you getting, if any?  Can you post a spy capture of what you are seeing?

Logan S.

[rfults]

There is a VISA Interactive Control program which displays all of the VISA resources.  It does not display the new GPIB card, even though MAX does.  MAX also displays the VISA address for my device (GPIB2::12::INSTR in this case).   When I run my CVI software, the viOpen function returns an error saying it cannot find the resource.  That's why I said VISA does not find the device/card. 

I think there may be other issues with the configuration of this PC, because NI SPY will not capture.  When I click the button to capture, I get this error msg: "The NI_VISA file C:\WinNT\System32\Visa32.dll is not built for NI Spy.  To fix the problem, please reinstall the National Instruments software for this API.".  I've uninstalled/reinstalled NI-VISA 3.3 and NI-488.2 2.30, but that did not help.

[ScottieB]

Have you ever/do you currently have any other VISA on the system along with NI-VISA?  That could cause what you're seeing, I'm guessing.

Scott B.
GPIB Software
National Instruments

[rfults]

Yes, that appears to be problem.  I didn't know there was an Agilent VISA, I just thought VISA was all NI-VISA.  I went into the Agilent configuration utility and added the card, and now it is being recognized.