Cannot see my instrument in NI-VISA config, Red Hat 5, USB connection.. HELP

[mkossmann]

Did you reboot the system ? Just blacklisting doesn't unload an allready loaded module.

Another option would be to move away the module from the location where it is loaded from ( probably somewhere under /lib/modules/<your running kernel version>. But this is only a workaround, since every kernel update will bring back the module. In that case you might ask on a Red Hat specific support channel for the right way to blacklist the module.

[DavidLoganProgrammer]

I swear i rebooted the system... i'll try it again when i go back in after the weekend. Thank you so much for your help! I hope this is the issue i've been having the whole time and that once i blacklist usbtmc, it will work.

[robo_Jeff]

Hi DavidLoganProgrammer,

Is VISA the only NI product in the equation? Keysight has their own VISA drivers. We don't support it, but it might be worth a shot.

[DavidLoganProgrammer]

Hey Jeff,

Yeah, Keysight doesn't support VISA drivers for linux really, they refer me to http://www.tamsinc.com/sicl/ .. The drivers are pretty pricey so I just wanted to see if the NI VISA drivers worked on my red hat system because that would be a free solution for automating the VNA.

David

[robo_Jeff]

Hi David,

What environment are you progamming in?

[DavidLoganProgrammer]

Red hat enterprise linux 5

[robo_Jeff]

Hi David,

What I meant was: What language are you programming in (C, C#, C++, etc)?

[DavidLoganProgrammer]

Hey Jeff,

Python. Using the PyVisa library, which is a wrapper for the visa i/o library.

[robo_Jeff]

Hi David,

Thanks for clarifying. Unfortunately we don't support Python, so while some customers are able to get desired functionality using Python, I don't specifically know why. I wish there was more support I could provide for you. Hopefully another forum user will chime in for you.

[DavidLoganProgrammer]

Hey Jeff,

I feel that the choice to use Python is quite arbitrary in this case, since it is just a wrapper for the NI VISA library. The NI Visa configuration utility doesn't even see the usb device connected, so I don't think i'd have any better luck with a C/C++ program.