<div dir="ltr"><br><div>the backed file is now l3backend-pdfmode.def (or
l3backend-luatex.def) the pdfmode.def file is no longer used.</div><div>If it is being referenced then either your formats didn't get remade</div><div>fmtutil-sys --all</div><div>should remake them</div><div>or you have a local format that is masking the ones made by the system update</div><div>check with</div><div>kpsewhich --engine=pdftex --all pdflatex.fmt</div><div>that you don't have an old local pdflatex format in your input path</div><div><br></div><div><br></div><div><br></div><div><br></div><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Mon, 28 Sep 2020 at 21:10, AC <<a href="mailto:achirvasub@gmail.com">achirvasub@gmail.com</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">I have two machines running vanilla-installed TL, migrated[0] from 2019 on both.<br>
<br>
I have compiled with pdflatex on both just fine. <br>
<br>
After a recent upgrade, running 'pdflatex' (i.e. the command pdflatex <tex-file> in a linux terminal) on one of them (henceforth BAD) results in the error that l3backend-pdfmode.def cannot be found.<br>
<br>
On the other one (henceforth GOOD) everything works fine, even though l3backend-pdfmode.def is not present there either.<br>
<br>
On both machines I have l3backend-pdfmode.def in <path-to-texlive>/2019/texmf-dist/tex/latex/l3backend/<br>
<br>
but GOOD runs without issues without that file in the analogous 2020 folder, whereas on BAD I have to copy that file to <br>
<br>
<path-to-texlive>/2020/texmf-dist/tex/latex/l3backend/<br>
<br>
to fix the problem.<br>
<br>
---<br>
<br>
References:<br>
<br>
[0] <a href="https://tug.org/texlive/upgrade.html" rel="noreferrer" target="_blank">https://tug.org/texlive/upgrade.html</a><br>
<br>
</blockquote></div></div>