32-Bit Python, "Other Socket error (22)"

[Flow86]

Hi,

I'm trying to use python-snap7 2.0.2 on a 32-Bit python (tried 3.9 and 3.11).

When I try to start the server with

python -m snap7.server

I get:

[INFO]: creating server
[INFO]: setting event callback
[INFO]: registering area 5, index 1, size 100
[INFO]: registering area 1, index 1, size 100
[INFO]: registering area 4, index 1, size 100
[INFO]: registering area 3, index 1, size 100
[INFO]: initialising with standard values
[INFO]: registering area 5, index 0, size 976
[INFO]: setting server TCP port to 1102
[INFO]: starting server on 0.0.0.0:1102
[INFO]: callback event: 2025-12-02 07:43:56 Server started
[INFO]: callback event: 2025-12-02 07:43:56 Server started
[ERROR]: b' TCP : Other Socket error (22)'
Traceback (most recent call last):
  File "<frozen runpy>", line 198, in _run_module_as_main
  File "<frozen runpy>", line 88, in _run_code
  File "C:\workspace\tools\Python312-32\Lib\site-packages\snap7\server\__main__.py", line 54, in <module>
    main()
  File "C:\workspace\tools\Python312-32\Lib\site-packages\click\core.py", line 1161, in __call__
    return self.main(*args, **kwargs)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "C:\workspace\tools\Python312-32\Lib\site-packages\click\core.py", line 1082, in main
    rv = self.invoke(ctx)
         ^^^^^^^^^^^^^^^^
  File "C:\workspace\tools\Python312-32\Lib\site-packages\click\core.py", line 1443, in invoke
    return ctx.invoke(self.callback, **ctx.params)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "C:\workspace\tools\Python312-32\Lib\site-packages\click\core.py", line 788, in invoke
    return __callback(*args, **kwargs)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "C:\workspace\tools\Python312-32\Lib\site-packages\snap7\server\__main__.py", line 50, in main
    mainloop(port, init_standard_values=True)
  File "C:\workspace\tools\Python312-32\Lib\site-packages\snap7\server\__init__.py", line 405, in mainloop
    server.start(tcp_port=tcp_port)
  File "C:\workspace\tools\Python312-32\Lib\site-packages\snap7\error.py", line 121, in inner
    check_error(code, context=context)
  File "C:\workspace\tools\Python312-32\Lib\site-packages\snap7\error.py", line 143, in check_error
    raise RuntimeError(error)
RuntimeError: b' TCP : Other Socket error (22)'
[INFO]: destroying server

When I try the same with 64-Bit python, it works:

[INFO]: creating server
[INFO]: setting event callback
[INFO]: registering area 5, index 1, size 100
[INFO]: registering area 1, index 1, size 100
[INFO]: registering area 4, index 1, size 100
[INFO]: registering area 3, index 1, size 100
[INFO]: initialising with standard values
[INFO]: registering area 5, index 0, size 976
[INFO]: setting server TCP port to 1102
[INFO]: starting server on 0.0.0.0:1102
[INFO]: callback event: 2025-12-02 07:34:16 Server started
[INFO]: callback event: 2025-12-02 07:34:16 Server started
[INFO]: 2025-12-02 07:34:16 Server started

The point is, we have software where we need to use the 32-Bit version.
Does somebody know what do to or adapt?

It even looks more like that this is a bug in the C-Library, not the python code?

[gijzelaerr]

Closing as outdated. Python-snap7 3.0 is a pure Python implementation and no longer uses the native C library, so 32-bit vs 64-bit native library issues no longer apply.