SOLVED : ImportError: DLL load failed while importing _extra

[kachihro]

Have found an issue with the solution - when configuring the solution on a NEW 'build' VM.
(we had problems on a client PC - and needed a NEW setup)

When running the command for "prepdocs" - we had this error ;

_ImportError: DLL load failed while importing extra

After some investigation and testing, we found that it's related to a Python package for "PyMuPDF".

It's a known issue - we had to install the VC++ redistributable.

PYMUPDF >
https://pymupdf.readthedocs.io/en/latest/installation.html#problems-after-installation

MSDN VC++ >
https://learn.microsoft.com/en-au/cpp/windows/latest-supported-vc-redist?view=msvc-170#latest-supported-redistributable-version

*** Hope this helps !

[pamelafox]

@kachihro What Python version was on that VM? I'm wondering if its a Python 3.14 issue. I am not yet running the CI for Python 3.14. Let me try it now and see if we get failures due to missing wheels.

[kachihro]

Thanks - we had tried with the latest python, initially (3.14)

And then un-installed - and used Python 3.11.9
https://www.python.org/downloads/release/python-3119/

And had the same problem.

I think it's actually a package that expects a certain DLL. There is a link above - to their own article (*PYMUPDF)
And - most developers would have Visual Studio installed - and the C++ redistributable.

After installing it (on a new Win.11 VM) - we were OK/successful.

Maybe just need a note - about "known issues" - and a link to the VC++ (as above)