<div dir="ltr"><div>Most likely you have an old local format masking the updated one, check with</div><div><br></div><div> kpsewhich --all --engine=pdftex pdflatex.fmt</div><div><br></div><div>that you have not got multiple formats.<br></div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Sun, 7 Feb 2021 at 11:11, Maximilian Nöthe <<a href="mailto:maximilian.noethe@tu-dortmund.de">maximilian.noethe@tu-dortmund.de</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">Hi all,<br>
<br>
Today I updated TeXLive via tlmgr update --self --all and since then, <br>
loading expl3 fails with the following<br>
error:<br>
<br>
<br>
```<br>
<br>
! LaTeX3 Error: Mismatched LaTeX support files detected.<br>
(LaTeX3) Loading 'expl3.sty' aborted!<br>
(LaTeX3)<br>
(LaTeX3) The L3 programming layer in the LaTeX format<br>
(LaTeX3) is dated 2020-10-05, but in your TeX tree the files require<br>
(LaTeX3) at least 2021-02-02.<br>
```<br>
<br>
<br>
I tried rebuilding the formats with fmtutil-sys --all, but didn't help.<br>
<br>
Any idea how to solve this?<br>
<br>
Regards<br>
Max<br>
<br>
</blockquote></div>