Pyinstaller create this error :“File ”multiprocessing\connection.py“, line 691

[Formationgrowthhacking]

Hi everyone,

I am trying to make the executable of my python script with Pyinstaller. I am using:
PyInstaller: 3.6
Python: 3.7.7
Windows 10 64Bits

When I run my script from Windows command terminal, it works fine. When I run the exe produced by Pyinstaller I have this error shown on terminal:

Output:
Process SpawnProcess-4:
Traceback (most recent call last):
  File "multiprocessing\process.py", line 297, in _bootstrap
  File "multiprocessing\process.py", line 99, in run
  File "concurrent\futures\process.py", line 233, in _process_worker
  File "multiprocessing\queues.py", line 113, in get
  File "multiprocessing\managers.py", line 943, in RebuildProxy
  File "multiprocessing\managers.py", line 793, in __init__
  File "multiprocessing\managers.py", line 847, in _incref
  File "multiprocessing\connection.py", line 490, in Client
  File "multiprocessing\connection.py", line 691, in PipeClient
FileNotFoundError: [WinError 2] The system cannot find the file specified
A process in the process pool was terminated abruptly while the future was running or pending. --> Error multiprocessor]

This is my piece of code which create this error:

 with concurrent.futures.ProcessPoolExecutor() as executor:
            try:
                #multiprocesses = executor.map(mymodules.run_smartphone, list_arguments_smartphones)
                multiprocesses = executor.map(mymodules.run_smartphone, list_smartphones_connected,
                                              [lock] * len(list_smartphones_connected))
                for function_return_value in multiprocesses:
                    print(function_return_value)

            except Exception as ex:
                print(f"{ex} --> Error multiprocesses")

My code start with the freeze as recommended:

if __name__ == '__main__':
   import multiprocessing
   multiprocessing.freeze_support()

So I made the exe with the option --dir in order to make the executable with dolls, and I get exact same issue.

I run some specific Pyinstaller commands, it is displaying something, but I don't understand what it means:

Output:
E:\>pyi-bindepend Myprogram.exe
Myprogram.exe {'KERNEL32.dll', '*_Microsoft.Windows.Common-Controls_6595b64144ccf1df_6.0.0.0_none', 'WS2_32.dll', 'ADVAPI32.dll'}

E:\>pyi-archive_viewer Myprogram.exe
 pos, length, uncompressed, iscompressed, type, name
[(0, 270, 354, 1, 'm', 'struct'),
 (270, 1124, 1832, 1, 'm', 'pyimod01_os_path'),
 (1394, 4376, 9337, 1, 'm', 'pyimod02_archive'),
 (5770, 7417, 18651, 1, 'm', 'pyimod03_importers'),
 (13187, 1868, 4175, 1, 's', 'pyiboot01_bootstrap'),
 (15055, 266, 321, 1, 's', 'pyi_rth_certifi'),
 (15321, 1080, 1775, 1, 's', 'pyi_rth_multiprocessing'),
 (16401, 8845, 18589, 1, 's', 'Myprogram'),
 (25246, 3052666, 3052666, 0, 'z', 'PYZ-00.pyz')]
?

so I added in the .spec file some hiddenimport:

hiddenimports=["socks","multiprocessing","concurrent"],
as I saw issues with multiprocessing and futures.. But it didn't fix anything

I tried this one:

hiddenimports=["socks","multiprocessing","concurrent.futures"],
still same issue.

So I check this line 691 in this connection.py file, but I don't understand the issue:

def PipeClient(address):
        '''
        Return a connection object connected to the pipe given by `address`
        '''
        t = _init_timeout()
        while 1:
            try:
                _winapi.WaitNamedPipe(address, 1000)<==------------------------[line 691]
                h = _winapi.CreateFile(
                    address, _winapi.GENERIC_READ | _winapi.GENERIC_WRITE,
                    0, _winapi.NULL, _winapi.OPEN_EXISTING,
                    _winapi.FILE_FLAG_OVERLAPPED, _winapi.NULL
                    )
            except OSError as e:
                if e.winerror not in (_winapi.ERROR_SEM_TIMEOUT,
                                      _winapi.ERROR_PIPE_BUSY) or _check_timeout(t):
                    raise
            else:
                break
        else:
            raise

        _winapi.SetNamedPipeHandleState(
            h, _winapi.PIPE_READMODE_MESSAGE, None, None
            )
        return PipeConnection(h)

I am not good enough in Python to fix this issue. I can just make the conclusion that Pyinstaller is breaking something as the script is running perfectly fine from the terminal. Also I see that system is saying it cannot find a file. So a file or module is missing, that is why I tried some stuff in .spec file.

Does anyone know the source of my problem please?

[steve_shambles]

Hi Formationgrowthhacking
I'm afraid I can't be much help to you,
have you seen this post:
https://stackoverflow.com/questions/1590...rocesspool

It suggests that if you haven't used:

if __name__ == '__main__':
    main()

it might cause the error you are seeing.

If this doesn't help all I can do
is offer to try and use Pyinstaller
on your code from my machine to see if it
works or gets the same error.

good luck
steve

[buran]

The error is it cannot find a file. If it works in terminal, but the exe fails, most probably you have problem with paths
look at https://pyinstaller.readthedocs.io/en/st...nformation
There is nice script that can help you identify which path you should use when converted to executable. from information provided it's difficult to identify exactly where the issue with the path is.

Although you may have hidden imports, I think they would produce a different kind of error - some sort of import error if it cannot find a module.