[COM] Connecting to NI-VISA server

[thedeadliestcatch]

I have been trying to get pyvisa to get along with NI-VISA server to no avail,

I noticed the 'find' family of functions (which will use the hosts configured through 'visaconf') is also not implemented even when using the ivi/visa (non librevisa) backend.

Both IP and ADDR are correct, However, this is the result when attempting to connect:

>>> inst = rm.open_resource('TCPIP0::IP_OF_SERVER::gpib0,ADDR::INSTR')
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/usr/lib/python3/dist-packages/pyvisa/highlevel.py", line 3304, in open_resource
    res.open(access_mode, open_timeout)
  File "/usr/lib/python3/dist-packages/pyvisa/resources/resource.py", line 297, in open
    self.session, status = self._resource_manager.open_bare_resource(
                           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/lib/python3/dist-packages/pyvisa/highlevel.py", line 3232, in open_bare_resource
    return self.visalib.open(self.session, resource_name, access_mode, open_timeout)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/lib/python3/dist-packages/pyvisa/ctwrapper/functions.py", line 1851, in open
    ret = library.viOpen(
          ^^^^^^^^^^^^^^^
  File "/usr/lib/python3/dist-packages/pyvisa/ctwrapper/highlevel.py", line 222, in _return_handler
    return self.handle_return_value(session, ret_value)  # type: ignore
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/lib/python3/dist-packages/pyvisa/highlevel.py", line 251, in handle_return_value
    raise errors.VisaIOError(rv)
pyvisa.errors.VisaIOError: VI_ERROR_INV_PROT (-1073807239): The protocol specified is invalid.

gpib0,ADDR is correctly reported from the Keysight VISA and I can confirm that adding the resource locally from the host itself works (obviously using its own IP or localhost).

Network connectivity is allowed to pass thru.

Instrument details

NI-VISA server running on Windows 11 test host with GPIB USB interface.

Output of pyvisa-info

$ pyvisa-info
Machine Details:
   Platform ID:    Linux-...
   Processor:      x86_64

Python:
   Implementation: CPython
   Executable:     /usr/bin/python3
   Version:        3.12....
   Compiler:       ...
   Bits:           64bit
   Build:         ....
   Unicode:        UCS4

PyVISA Version: 1.11.3

Backends:
   ivi:
      Version: 1.11.3 (bundled with PyVISA)
      #1: /usr/lib/x86_64-linux-gnu/libvisa.so.24.0.0:
         found by: auto
         bitness: 64
         Vendor: National Instruments
         Impl. Version: National Instruments
         Spec. Version: National Instruments
      #2: /usr/lib/x86_64-linux-gnu/libvisa.so.0.0.0:
         found by: auto
         bitness: 64
         Could not get more info:
            VI_ERROR_NSUP_ATTR (-1073807331): The specified attribute is not defined or supported by the referenced object.
   py:
      Version: 0.5.1
      ASRL INSTR: Available via PySerial (3.5)
      USB INSTR: Available via PyUSB (1.2.1-2). Backend: libusb1
      USB RAW: Available via PyUSB (1.2.1-2). Backend: libusb1
      TCPIP INSTR: Available 
      TCPIP SOCKET: Available 
      GPIB INSTR: Available via Linux GPIB (b'4.3.7-rc1')
      GPIB INTFC: Available via Linux GPIB (b'4.3.7-rc1')