Thank you for you response.

Actually, I use WinPyton Control Panel only do do the file associations and to add the shell extensions. My server has no internet connection so I don't plan to use the control panel to manage the packages. Is there another easy way to associate .py with Python, add the start menu entries and to get the Shell extensions?

Kind regards,
Stephan

... mh, I tried the the suggested \scripts\make_winpython_fix.bat and once again it returned an error message:

patch pip and current launchers for non-move
D:\Program files\WinPython\WPy64-39100\python-3.9.10.amd64\python.exe -c "import sys; print(sys.maxsize > 2**32)"  *  D:\Program files\WinPython\WPy64-39100\python-3.9.10.amd64
Traceback (most recent call last):
  File "<string>", line 1, in <module>
  File "D:\Program files\WinPython\WPy64-39100\python-3.9.10.amd64\lib\site-packages\winpython\wppm.py", line 273, in __init__
    self.version, self.architecture = utils.get_python_infos(
  File "D:\Program files\WinPython\WPy64-39100\python-3.9.10.amd64\lib\site-packages\winpython\utils.py", line 387, in get_python_infos
    is_64 = python_query(
  File "D:\Program files\WinPython\WPy64-39100\python-3.9.10.amd64\lib\site-packages\winpython\utils.py", line 375, in python_query
    return exec_shell_cmd('%s -c "%s"' % (the_exe, cmd), path).splitlines()[0]
IndexError: list index out of range
Press any key to continue . . .

Kind regards,
Stephan

I'm a Python beginner but I recognized the issue occurs in the file 'utils.py' and Python cannot split what exec_shell_cmd returned.

The function exec_shell_cmd uses subprocess.open to execute the command

python -c "import sys; print(sys.maxsize > 2**32)"

This works well when I start it from the Python command prompt. Here it returns True. The function in the script returns null.

Got it! WinPython 3.9.10 seems to have an issue with the space in the path. I've installed it under 'D:\Program Files'. I've isolated the function calling subprocess.popen and made several tests. At the end, I simply copied the entire WinPython folder to D:\WPy64-39100 and here I can start the WinPython Control Panel.

To fix it, I changed line 375 in utils.py from

return exec_shell_cmd('%s -c "%s"' % (the_exe, cmd), path).splitlines()[0]

to

return exec_shell_cmd('"%s" -c "%s"' % (the_exe, cmd), path).splitlines()[0]

and now it works.