Python M6 Remap Not Callable in LinuxCNC 2.9.4– Function Not Recognized

Hello everyone,I’m facing a persistent issue with implementing a Python-based M6 remap in LinuxCNC 2.9.4 running on Debian Bookworm. No matter what I try, LinuxCNC always reports that my remap function is “not a Python callable function,” even though I have followed all the official documentation and community advice.Details:

• Configuration:
  • In my INI file, I have:
  • [RS274NGC]
    
    
    PARAMETER_FILE = linuxcnc.var
    RS274NGC_STARTUP_CODE = G21 G40 G90 G94 G97 G64 P0.025
    REMAP = M6   python=my_m6_remap_function modalgroup=6
    
    [PYTHON]
    PATH_PREPEND=/path/to/my/python/scripts                            
    PATH_APPEND=/path/to/my/python/scripts  
    TOPLEVEL=/path/to/my/python/script/m6_tool_change.py
    
    The Python file is in the correct directory, and the function name matches exactly. The function signature is:
    •     def my_m6_remap_function(self, **words):
              # minimal test code
              print("Hello from  REMAP")
              return INTERP_OK
      
      
      
      I have tried different function names, ensured the function is top-level (not inside a class or another function), and removed any __init__.py, .pyc, or __pycache__ files.File encoding is correct (UTF-8/ASCII), and permissions are set properly.Result:I always get the following error:
          'my_m6_remap_function' is not a Python callable function - ...:REMAP = M6   python=my_m6_remap_function modalgroup=6
      I have tested this on multiple machines, with fresh configs (including a clean Axis config), and even on a different PC – always the same result.Remapping using ngc (subroutine) works perfectly.
      I can import linuxcnc in Python 3 without issues.
      I have tried examples from stdglue.py and the forums – same error.Environment:Debian BookwormLinuxCNC 2.9.4 (from official repositories)Python 3 bindings are present and workingNotes:I suspect this is either a bug in LinuxCNC 2.9.4 on Bookworm or a missing package/feature in the current build.
      Downgrading to an older distro or using Python 2 is not a practical option for me.I need Python remap for integration with a custom PyQt5 GUI and an Automatic Tool Changer (ATC).Has anyone else encountered this issue or found a practical solution?Is there a way to enable Python remap support in this environment, or any workaround besides using ngc?
      Any help or suggestions would be greatly appreciated!
      

You mean the ini file or what ?