VISA Interactive Control does not see my device

Question

Hi,
I am using a NI USB-GPIB. The MAX can see the device and even can communicate with it but the VISA Interactive Controle Utility does not recognize it. That is the reason why my software is not reacting too it since I used VISA reads/writes.
I attached a NI-report to it so you can what is missing (if).
Note that I have installed my software on several stations and it worked.
What do I miss in here?
Thanks
Yariv3G
Attachments:
nireport.txt ‏2 KB

Answer 1

yariv3G,
As you said, you equipment worked fine on several other stations, but this station had an issue. As Joe pointed out it would be nice if everything always just worked, but with so many variables in the mix some times you just have to sit down and troubleshoot.
How do you avoid long flush times? Well, try to solve the problem intelligently. I know that is an ambiguous statement, so I will give my recommendation.
1. Check the KnowledgeBases to see if this is a known issue.
2. Search the Forums to see if any customers like yourself have run into the same problem.
Now here the next steps could go anywhere depending on your knowledge of the product and the issue itself.
If you don't know the product very well:
3. Post on the forums then while you wait for your reply do some research (read the manual, tutorials, google...)
If you did know the product pretty well you might just start logically picking apart the problem, then run through the steps you come up with. Here is what I would have done in your situation and why:
Communicating with your device worked fine in MAX. So, NI-488.2 worked fine (MAX makes calls directly to the NI-488.2 driver, ie ibwrt, ibrd). The VISA Interactive control wouldn't find your instrument. So, NI-VISA is probably messed up.
3. Reinstall NI-VISA, and if there is a newer version available you might as well use that since it probably has some bug fixes.
Still doesn't work? Well, how does VISA work? VISA Simply makes calls into other drivers so in your case VISA will make calls to the NI-488.2 driver. So maybe NI-488.2 works fine, but the driver (DLL) might be named something different, in a different location, perhaps you have two copies of it. My next steps would be.
4. Uninstall NI-488.2, and install the latest version. If it still doesn't work reinstall VISA again to make sure it finds the driver.
Hope this helps, or at least gives a better idea of what might have happened.
Shawn B.
National Instruments
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