Alois Steindl Alois.Steindl at tuwien.ac.at
Sun Apr 14 22:32:26 CEST 2024

I do not receive any error with TL2023 and TL2024.
You seem to use an old ltugboat.cls (in your attached file you use the 
article class; I would bet you will not get an error with that.), here 
it reads
> (e:/texlive/2023/texmf-dist/tex/latex/tugboat/ltugproc.cls
> Document Class: ltugproc 2023-10-28 v2.31 TUG conference proceedings class
> Class ltugproc Info: Class believes year is 2024.
Good luck

Am 14.04.2024 um 19:30 schrieb jmhuffle at femto-st.fr:
> Dear TeX live-rs,
> I discover some strange behavior. If I compile the minimal file 
> "hb-bof.tex" with pdflatex belonging to TeX Live 2023, I got the message
> (\end occurred when \ifx on line 2 was incomplete)
> at the process's end. If I compile with pdflatex from TeX Live 2021, 
> this message disappears. This seems to be related to the "ltugproc" 
> class, because if I replace it by "article", this message also 
> disappear. But I performed a "diff" of the 2 versions of this class: 
> only the dates are different.
> All the best,
> Jean-Michel Hufflen
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