Briefcase run command not workind

[adetobi22]

Briefcase run command not working, unable to start app.
I have listed the required dependencies in the pyproject.toml ( in my case it's just httpx) , i ran update update -d and build again. but the run command still doesn't work , it keeps displaying " unable to start app.

[freakboy3742]

It's very hard to diagnose problems like this without details.

At a minimum, we will need to know:

• What platform are you using (Windows? macOS? Android?)
• What are you trying to build (e.g., are you running the tutorial, or is it code of your own design?)
• Does the app start using briefcase dev?

[adetobi22]

I'm using Windows. still running the tutorial. it starts using briefcase dev but briefcase run doesn't work, briefcase run android still works well but it's not updated. the only dependency that needs to update was httpx.

[freakboy3742]

Unfortunately, diagnosing runtime Windows errors is one of the hardest problems, because Windows obscures the runtime logs. This is something we're hoping to address with #629.

In the meantime, the best diagnostic approach is to try to manually reproduce what briefcase run is doing on Windows. Try running:

"windows\msi\Hello World\src\python\python.exe" -m helloworld

substituting the formal name of your app for "Hello World" and app module for "helloworld". This should show you the output and error stream for the code.

[Jason-XII]

I'm facing the same problem. I'm using windows as well, and using the tutorial code and configuration. Error Log:

Traceback (most recent call last):
  File "runpy.py", line 194, in _run_module_as_main
  File "runpy.py", line 87, in _run_code
  File "E:\OneDrive\编程\helloworld\windows\msi\Hello World\src\\app\helloworld\__main__.py", line 4, in <module>
    main().main_loop()
  File "E:\OneDrive\编程\helloworld\windows\msi\Hello World\src\\app\helloworld\app.py", line 27, in main
    return HelloWorld()
  File "E:\OneDrive\编程\helloworld\windows\msi\Hello World\src\\app_packages\toga\app.py", line 272, in __init__
    self.factory = get_platform_factory(factory)
  File "E:\OneDrive\编程\helloworld\windows\msi\Hello World\src\\app_packages\toga\platform.py", line 53, in get_platform_factory
    from toga_winforms import factory
  File "E:\OneDrive\编程\helloworld\windows\msi\Hello World\src\\app_packages\toga_winforms\factory.py", line 1, in <module>
    from .app import App, MainWindow
  File "E:\OneDrive\编程\helloworld\windows\msi\Hello World\src\\app_packages\toga_winforms\app.py", line 8, in <module>
    from .keys import toga_to_winforms_key
  File "E:\OneDrive\编程\helloworld\windows\msi\Hello World\src\\app_packages\toga_winforms\keys.py", line 6, in <module>
    from .libs import WinForms
  File "E:\OneDrive\编程\helloworld\windows\msi\Hello World\src\\app_packages\toga_winforms\libs\__init__.py", line 1, in <module>
    from .fonts import (  # noqa: F401
  File "E:\OneDrive\编程\helloworld\windows\msi\Hello World\src\\app_packages\toga_winforms\libs\fonts.py", line 13, in <module>
    from .winforms import (
  File "E:\OneDrive\编程\helloworld\windows\msi\Hello World\src\\app_packages\toga_winforms\libs\winforms.py", line 3, in <module>
    import clr
  File "E:\OneDrive\编程\helloworld\windows\msi\Hello World\src\\app_packages\clr.py", line 6, in <module>
    load()
  File "E:\OneDrive\编程\helloworld\windows\msi\Hello World\src\\app_packages\pythonnet\__init__.py", line 43, in load
    if func(''.encode("utf8")) != 0:
  File "E:\OneDrive\编程\helloworld\windows\msi\Hello World\src\\app_packages\clr_loader\wrappers.py", line 20, in __call__
    return self._callable(ffi.cast("void*", buf_arr), len(buf_arr))
RuntimeError: cannot call null pointer pointer from cdata 'int(*)(void *, int)'

[adetobi22]

It turns out that the fault wasn't with the program. My system had RAM issues. After I change my RAM , everything worked succesfully