Re: [Quantlib-users] Error in building Python wheel

[Luigi B. <lui...@gm...>]

It looks like you're not using QuantLib 1.41 (the release you find at <
https://github.com/lballabio/QuantLib/releases/tag/v1.41> but a checkout of
the git repository, which is more recent than 1.41 and removed a few
deprecated classes.  If that's the case, you also need a checkout of the
git repository for QuantLib-SWIG.

Luigi


On Wed, Mar 11, 2026 at 12:38 PM Chirag Desai <chi...@ya...>
wrote:

> Hi
>
> I have been trying to build the Python wheel as advised on
>
> https://www.quantlib.org/install/windows-python.shtml
>
> I used latest Quantlib 1.41 and Quantlib-SWIG 1.41 as well.
>
> 1) I set up the environment variables
>
> [image: Inline image]
>
> 2) This works fine
> [image: Inline image]
>
> 3) I get an error message which I have attached in Error.txt but its along
> the line of incompatible Quantlib /SWIG versions as some of the below have
> been deprecated.
>
> C:\local\QuantLib-SWIG-1.41\Python>python -m build --wheel --no-isolation
>
> [image: Inline image]
> Any help pls ?
> Thank you
> Chirag
>
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