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After installing the latest miktex (20.11) on my new laptop, I tried to compile the following simple presentation in seminar style:

\documentclass[portrait]{seminar}
\begin{document}
\begin{slide*}
aaa
\end{slide*}
\end{document}

But I get the following error:

\document ->\endgroup \the \before@document \begingroup \UseOneTimeHook

On another machine where I use Miktex 2.9.6670 it works just fine.

Writing simple articles and Beamer presentations works fine.

Can anybody please help me. Thanks in advance

I also tried to find old miktex version 2.9.6670, but I could not find it anywhere. Andrej

user187802
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Andrej Mrvar
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    Seminar is a very old class and not compatible with a new latex. Why are you using it instead of e.g. beamer? – Ulrike Fischer Nov 15 '20 at 08:18
  • Thanks for your reply. I know, it is a very old class, but I have several presentations prepared in this way. For newer presentations I use beamer, but it would be a lot of work to update all this old presentations in seminar style to beamer. So I will be very thankful if there is a way to compile seminars presentations. Andrej – Andrej Mrvar Nov 15 '20 at 08:20
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    Contact the maintainer and ask if he is willing to update the class to make it compatible again https://ctan.org/pkg/seminar (he should already know about the incompatibility) – Ulrike Fischer Nov 15 '20 at 08:26
  • Thanks. I did. I will see if he (Herbert Voß) will answer. BTW is it possible to get Miktex 2.9.6670 complete installation anywhere? – Andrej Mrvar Nov 15 '20 at 08:36
  • You can also try to roll back to an older latex with latexrelease https://tex.stackexchange.com/a/565938/2388 – Ulrike Fischer Nov 15 '20 at 08:37
  • Unfortunately this does not work. Anybody knows if it is possible to get Miktex 2.9.6670 complete installation anywhere? Or some other version like this? – Andrej Mrvar Nov 15 '20 at 11:59
  • it works for me with your small example, I tried. You can get older texlive, but with miktex it is not possible to rollback. overleaf allows to switch to older texlive too (and it hasn't the new format yet anyway) so you could try to compile there. – Ulrike Fischer Nov 15 '20 at 12:08
  • Compiling givesthe error: various corrections for the Seminar document class added since seminar.bug and few add-ons for overlays (Version 2.3 of <2014/05/12> (DG, hv)) ) (C:\Viewers\MiKTeX\tex/latex/fancyvrb\hcolor.sty `hcolor' v1.4, 1998/03/19 (Denis Girou) ! LaTeX Error: Command \FvrbEx@ColoredBox undefined. See the LaTeX manual or LaTeX Companion for explanation. Type H for immediate help. ...
    l.21 \renewcommand\FvrbEx@ColoredBox [3]{%         – Andrej Mrvar Nov 15 '20 at 14:06
  • well as I wrote: the example in my answers works for me.Tested on a current, up-to-date miktex. Don't expect me to guess what you added to your document to get errors from hcolor and fancyvrb.. – Ulrike Fischer Nov 15 '20 at 14:18
  • Thanks for another answer. The strange fact is that I did not add anything, I just tried to compile the same simple test file with \RequirePackage[2020-02-02]{latexrelease} at the top. Why it looks to hcolor and fancyvrb is a miracle to me. – Andrej Mrvar Nov 15 '20 at 15:49
  • show the complete log-file when compiling my example below. – Ulrike Fischer Nov 15 '20 at 15:51

1 Answers1

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seminar patches \document in a way that is not compatible with a LaTeX 2020-10-01 and the new hooks the format implemented (the maintainer has been notified some months ago about the upcomming problem).

As a work-around you can rollback to an older latex with latexrelease:

\RequirePackage[2020-02-02]{latexrelease}
\documentclass[portrait]{seminar}
\begin{document}
\begin{slide*}
aaa
\end{slide*}
\end{document}

Be aware that this doesn't work with every package: if a new version of a package requires a feature of the new format it can fail or error if you rollback.

Ulrike Fischer
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  • After restarting the computer and refreshing the file name database the example tex file with addition "\RequirePackage[2020-02-02]{latexrelease}" at the top compiles without any problem, Even more: now, with this addition, I can compile all my old presentations. Dear Ulrike: THANKS A LOT. You saved a lot of work and time to me. I really appreciate your help. The problem solved. – Andrej Mrvar Nov 15 '20 at 17:02
  • @AndrejMrvar as a warning: the package will probably get the status unmaintained and be moved to obsolet. That means texsystem will not longer install it. – Ulrike Fischer Jun 24 '21 at 16:52