Using ResourceManager with NI-VISA?

I’ve downloaded and installed NI-VISA 2022 Q3 (latest as of time of this post). pyvisa seems to default to a DLL file located within the Windows folder. Anyway, the actual VISA drivers that come with the NI package are installed by default in C:\Program Files\IVI Foundation\VISA\Win64\NIvisa, at least to best of my understanding (there is a file inside the folder called NiVisaCom.dll).

So anyway, I’m trying this constructor: rm = pyvisa.ResourceManager(r"C:\Program Files\IVI Foundation\VISA\Win64\NIvisa") And get this error: Exception has occurred: LibraryError Error while accessing C:\Program Files\IVI Foundation\VISA\Win64\NIvisa: Could not find module ‘C:\Program Files\IVI Foundation\VISA\Win64\NIvisa’ (or one of its dependencies). Try using the full path with constructor syntax.

During handling of the above exception, another exception occurred:

File “G:\My Drive\NES\Code\IEEE488.py”, line 3, in <module> rm = pyvisa.ResourceManager(r"C:\Program Files\IVI Foundation\VISA\Win64\NIvisa")

My Python info is as follows: Python 3.10.6 (tags/v3.10.6:9c7b4bd, Aug 1 2022, 21:53:49) [MSC v.1932 64 bit (AMD64)] on win32

I’m not sure what that win32 at the end means to be honest. I’m running Win11 Pro 64bit.

[MatthieuDartiailh]

Note also that the RM expect the path to the DLL not to a folder.

[tstern9]

That solved it - Thank you!