After updating TeX Live, loading expl3 fails

[David Carlisle]

Most likely you have an old local format masking the updated one, check with

 kpsewhich --all --engine=pdftex pdflatex.fmt

that you have not got multiple formats.

On Sun, 7 Feb 2021 at 11:11, Maximilian Nöthe <
maximilian.noethe at tu-dortmund.de> wrote:

> Hi all,
>
> Today I updated TeXLive via tlmgr update --self --all and since then,
> loading expl3 fails with the following
> error:
>
>
> ```
>
> ! LaTeX3 Error: Mismatched LaTeX support files detected.
> (LaTeX3)        Loading 'expl3.sty' aborted!
> (LaTeX3)
> (LaTeX3)        The L3 programming layer in the LaTeX format
> (LaTeX3)        is dated 2020-10-05, but in your TeX tree the files require
> (LaTeX3)        at least 2021-02-02.
> ```
>
>
> I tried rebuilding the formats with fmtutil-sys --all, but didn't help.
>
> Any idea how to solve this?
>
> Regards
> Max
>
>
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