I'm writing my document and I want to include a list of acronyms using acro package. When I try to compile it with XeTeX an error emerges: Command \sectionformat undefined.

Here is minimal example to reproduce the error:

\documentclass[12pt, a4paper, final]{extarticle}

\setmainfont{Times New Roman}
\newfontfamily\cyrillicfont{Times New Roman}



    Just some text

I'm using MacTeX 2019.

  • 1
    Probably unrelated to the problem, but hyperref should usually be the last package in your preamble. There are only very few exceptions. – leandriis Oct 20 at 9:20
  • The MWE can further be reduced to \documentclass{extarticle} \usepackage{polyglossia} \setdefaultlanguage{russian} \usepackage{acro} \begin{document} Just some text \end{document}showing that acro and russian seem to interfere. – leandriis Oct 20 at 9:23
  • Although being about a different document class, the following question might be related: XeLaTeX: scrartcl + \setmainlanguage{russian} = “LaTeX Error: \chapterformat undefined.” – leandriis Oct 20 at 9:25
  • acro loads the package scrlfile which makes gloss-russian.ldf believe a KOMA-Script class is used. \noextras@russian then does \renewcommand{\sectionformat}{...} which throws the error. IMHO this is a bug in gloss-russian.ldf: it should not test with for a KOMA-Script class \ifdef{\KOMAScript} but with \ifdef{\KOMAClassName} – clemens Oct 20 at 9:52
  • I reported the issue here: github.com/reutenauer/polyglossia/issues/325 – clemens Oct 20 at 10:07

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