Python4Delphi CPU Crash

[Uefi1]

Hi I'm using the Delphi XE2 compiler and python4delphi crashes with any example from the demo =(

I am use Python from https://github.com/adang1345/PythonWin7/tree/master Python 3.13.1

[pyscripter]

This was discussed in https://en.delphipraxis.net/topic/12281-python4delphi-crash-immediately-after-launch/

[Uefi1]

This was discussed in https://en.delphipraxis.net/topic/12281-python4delphi-crash-immediately-after-launch/

I see that the problem was discussed and was not fixed ?

[pyscripter]

and was not fixed

You are using an unsupported operating system with an unsupported python version. Don't expect a fix. You may try to fix it yourself and contribute to this open source project though.

[Uefi1]

and was not fixed

You are using an unsupported operating system with an unsupported python version. Don't expect a fix. You may try to fix it yourself and contribute to this open source project though.

This release work 46cd7a6 , but the new version doesn’t work? What does the operating system and module for Delphi have to do with it?

[pyscripter]

Does the Embarcadero fork work for you?

[Uefi1]

Does the Embarcadero fork work for you?

Hello, not

[bigheart67]

Does anyone advise me that this issue is solved?
I have a problem in same issue.

My environment is Win11, XE5, Win64, python 3.13.5 and demo1 is crashed with CPU.
Upon debugging, at TPythonEngine.Initialize() function - PyConfig_SetString is crashed.

  if FPythonHome <> '' then
    PyConfig_SetString(Config,
      PPWcharT(PByte(@Config) + ConfigOffests[MinorVersion, TConfigFields.home]),
      PWCharT(StringToWCharTString(FPythonHome)));

[pyscripter]

@bigheart67 This was about using python 3.12 in Windows 7. You are using Windows 11. So the issues are not related.

Which version of P4D are you using (Embarcadero fork,, GetIt, or from this repo)?

If you are using this repo, are you using the latest version (master branch)?

[bigheart67]

I had downloaded from this repo with code download zip and extracted zip file.
And execute demo1 in the Delphi XE5 with debug mode.

[pyscripter]

I had downloaded from this repo with code download zip and extracted zip file.

Could you please try the Embarcadero fork and report whether that works?

[bigheart67]

I downloaded from below:
https://github.com/embarcadero/python4delphi

and get same error when execute demo1 in win64 with debug mode

https://github.com/bigheart67/GP-Shared-File/blob/main/python4delphi-error.png

[pyscripter]

I downloaded from below:
https://github.com/embarcadero/python4delphi

It can't be. The code above is from this repo.

[pyscripter]

@bigheart67 Could you please download (again) from https://github.com/embarcadero/python4delphi and test whether it works and if not where it fails?

[bigheart67]

I downloaded again from https://github.com/embarcadero/python4delphi and tested demo1.
It was crashed but the crash point is different.

• 1 From this repo, crashed at TPythonEngine.Initialize()
  PyConfig_SetString(Config, Config.home, PWCharT(StringToWCharTString(FPythonHome)));
• 2 From https://github.com/embarcadero/python4delphi, crashed at TPythonEngine.Initialize()
  Status := Py_InitializeFromConfig(Config);

[pyscripter]

I have tried with the following python version:

*** Python 3.13.5 (tags/v3.13.5:6cb20a2, Jun 11 2025, 16:15:46) [MSC v.1943 64 bit (AMD64)] on win32. ***
>>> 

It works with the current state of this repo, as well as the state of the repo back in May.

I suspect this has something to do with your python version.

Can you try to uninstall and reinstall python from www.python.org on your Windows 10 machine?