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I've noticed errors like this when using the extract package:

(\end occurred inside a group at level 1) ### semi simple group (level 1) entered at line 5 (\begingroup)

This seems to happen even with an almost empty document, for example:

\documentclass{article} \usepackage[generate=foo.ext]{extract} \begin{document} Hello! \end{document}

Would anyone have an idea why extract (extract 2019/09/18 v1.9a) is causing that error, and how to fix it?

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  • Just wondering if you read the manual, e.g. example on p.3 mirror.marwan.ma/ctan/macros/latex/contrib/extract/extract.pdf ? At a glance your code doesn't seem to be complete for the extract environment. Commented Jul 21, 2021 at 17:57
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    the package redefines \begin and \end and completly breaks the new hook system of LaTeX, I wouldn't use it. Commented Jul 21, 2021 at 18:12
  • @MS-SPO: I reduced this from a complete (and working-in-production) setup. I figured I should remove as much as possible while still retaining the error -- should the package be expected to cause this error unless it was more fully configured? Commented Jul 22, 2021 at 0:16
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    No. Write the author. He probably can use the new hooks instead of destroying them, or he could ask for real interfaces instead of redefining internal commands. Commented Jul 22, 2021 at 6:48
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    I think he will manage. Commented Jul 22, 2021 at 8:29

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extract was created in 2005, long before any hook system was even discussed. So the new LaTeX destroyed the extract package.

As I am not using LaTeX anymore for a long time, and I have no clue about the changes in LaTeX that destroyed extract, it will probably a better idea if someone else has a look at the problem. Ulrike Fisher? I can integrate the required changes in the package and post it to CTAN.

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  • Thank you so much for your response! I understand that it may not be something you're keen on dealing with if you've moved on, so I really appreciate it. @UlrikeFischer: If you have any pointers or advice, I could try and look into this, too. I don't know anything about the new hooks yet, but I could give it a try. Commented Jul 22, 2021 at 10:18
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    @KerrekSB sorry I never got a ping from your comment. If you want to learn something about the new hooks, read the documentation texdoc lthooks-doc.pdf should give it too you. Commented Aug 12, 2021 at 7:34

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