Problems with VISA connectivity (visadev)

Using the function

visadev('TCPIP0::127.0.0.1::inst0::INSTR')

Gives the error

Unable to get VISA installation information from shared library.

And

visadevlist

returns

Unable to find any VISA resources during the specified timeout period. Open the vendor's control software to search for available

VISA resources.

[Nicholas Estes]

I am getting the same error. I am a bit peeved that the MATLAB editor explicitly warns against using 'visa' instead of 'visadev', when the refactoring is empirically not as trivial as the documentation suggests.

My scripts using visa have been hanging on fclose(obj), so I had hoped changing to visadev would fix things, but it looks like they have gotten worse.

[Nicholas Estes]

I should clarify that I am using Keysight instruments, with the latest version of IO Libraries. Keysight Connection Expert can "see" the instruments, and I am able to communicate with them using the "visa" function and fprintf, query, etc.

[Nicolas Garcia]

I am also getting this error when connecting to Keysight instruments. It is particularly frustrating because there appears to be no change in the hardware or connectivity setup parameters. I didn't run into this issue using the original 'visa'

[Zahra Vaziri]

I'm having the same problem! @Lukas Grundmann answer did not help...

Anyone have any more ideas?

Answer 1

[Lukas Grundmann]

Hello,

I had the exact same problem and fixed it as follows:

1. Open your Keysight Connection Expert
2. In the top right hand corner, click the little gear symbol to open the settings dialogue
3. Go to "Tools"
4. Got to "VISA Conflict Manager"
5. In the tab "General VISA Settings", no implmentations were enabled when I first opened it. I have multiple implementations installed and now enabled "Keysight VISA" and "Keysight VISA.NET". Also, I selected them as the "Preferred Implementation".
6. Press "Apply" and "OK"

After this, the

visadev

command worked again for me.

[Akshayaa Pandiyan]

I tried this and it was still the same error. Increasing the Timeout didnt help either. Any idea why this is?

[Roel]

worked for me, thanks!

[carl oros]

I had same issue. Worked perfectly! Thank you!!

Answer 2

[Andrei]

This can be fixed in the vendor's VISA Conflict Manager utility. Refer to https://www.mathworks.com/matlabcentral/answers/1684554-why-do-i-get-an-error-with-visadev-and-visadevlist