>|Did something inadvertent happen to \doublebar in the
>|most recent update? Some files that use that command were
>|working prior to the upgrade, but now that command is
>|throwing an error: Undefined control sequence.
Hi. Thanks for the report and the example, which
unfortunately was not very "minimal". But there is indeed a
bug in musixtex.tex-131 which I think only manifests when
using \doublebar in an "extract" in a latex file.
I believe the fix is to comment out line 2314 in
musixtex.tex; i.e., \let\doublebar\doublebar@II. Somehow
that line appeared between 1.30 and 1.31 but I don't recall
why.
A simple workaround for you is to use \setdoublebar instead.
Here is a more minimal example:
\documentclass[10pt]{article}
\usepackage{musixtex}
\begin{document}
\begin{music}
\instrumentnumber{1}\setstaffs1{2}\setclef1{60}\generalmeter{\meterC}\nobarnumbers\generalsignature{2}%
\startextract
\NOtes\zwh a\wh c\nextstaff\zwh e\wh h\en
\doublebar% %PROBLEMATIC! use \setdoublebar
\endextract
\end{music}
\end{document}
Bob T.
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