acro因此，我在使用带有的包时遇到了一个奇怪的编译错误（xelatex）bibunits。这是一个最小工作示例：
\documentclass{report}
\usepackage{lipsum}
\usepackage{acro}
\usepackage{natbib}
\usepackage{bibunits}
\usepackage{hyperref}
\defaultbibliographystyle{apalike}
\defaultbibliography{refs}
\DeclareAcronym{ITCZ}{
short = ITCZ,
long = Intertropical Convergence Zone
}
\begin{document}
\begin{bibunit}
There has never been more \acl{ITCZ} \citep[\acs{ITCZ};][]{Smith_Lorem_1980}.
\lipsum
\putbib
\end{bibunit}
\end{document}
文件内容refs：
@BOOK{Smith_Lorem_1980,
AUTHOR = {John Smith},
TITLE = {Sit Amet},
YEAR = {1980},
PUBLISHER = {Knopf},
}
问题是，There has never been more \acl{ITCZ} \citep[\acs{ITCZ};][]{Smith_Lorem_1980}.我想使用首字母缩略词的长名称，然后在引文中使用短版本；因此输出应该类似于Intertropical Convergence Zone (ITCZ; Smith 1980)。我遇到的问题是，当此行后有一定数量的文本时，编译时会抛出错误。一两行文本似乎不会引起问题，但会\lipsum触发错误。可以通过使用和不使用进行编译来测试\lipsum。
发生的错误是
(./bu1.aux
! Undefined control sequence.
l.3 \acro
@used@twice {ITCZ}{1}{1}{0}
bu1.aux文件中还有一行
\acro@used@twice {ITCZ}{1}{1}{0}
有人知道发生了什么事吗？
bu1.aux编译后文件的内容
\bibstyle{apalike}
\citation{Smith_Lorem_1980}
\acro@used@twice {ITCZ}{1}{1}{0}
\bibdata{refs}
完整日志
This is XeTeX, Version 3.14159265-2.6-0.999991 (TeX Live 2019) (preloaded format=xelatex 2020.3.20) 16 JUN 2020 18:54
entering extended mode
restricted \write18 enabled.
%&-line parsing enabled.
**main.tex
(./main.tex
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Document Class: report 2019/12/20 v1.4l Standard LaTeX document class
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File: size10.clo 2019/12/20 v1.4l Standard LaTeX file (size option)
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File: lipsum.ltd.tex 2019/01/02 v2.2 The Lorem ipsum dummy text
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Package: bibunits 2004/05/12 v2.4 Multiple bibliographies in one document.
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\@bibunitauxcnt=\count188
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[1
]
No file bu1.bbl.
(./bu1.aux
! Undefined control sequence.
l.3 \acro
@used@twice {ITCZ}{1}{1}{0}
? x
Here is how much of TeX's memory you used:
12210 strings out of 479805
222229 string characters out of 5893180
738150 words of memory out of 5000000
29240 multiletter control sequences out of 15000+600000
532714 words of font info for 27 fonts, out of 8000000 for 9000
1348 hyphenation exceptions out of 8191
43i,4n,48p,789b,436s stack positions out of 5000i,500n,10000p,200000b,80000s
Output written on main.pdf (1 page).
答案1
正如评论中提到的，此问题仅发生在较旧的代码库中acro。使用当前版本acro（v3.2，2020-05-10）和\usepackage{acro}或（更明确地说），\usepackage[version=3]{acro}此问题不会出现。但可以使用重现该错误\usepackage[version=2]{acro}。
潜在的问题似乎是在正常类别代码制度中bibunits读取单元文件，其中是“其他”字符，但代码需要是字母。可以通过添加对读取文件的宏的调用来解决这个问题。.aux@acro\acro@used@twice@\makeatletter.aux
\documentclass{report}
\usepackage{lipsum}
\usepackage[version=2]{acro}
\usepackage{natbib}
\usepackage{bibunits}
\usepackage{hyperref}
\makeatletter
\def\@startbibunit{%
\global\let\@startbibunitorrelax\relax
\global\let\@finishbibunit\@finishstartedbibunit
\global\advance\@bibunitauxcnt 1
\if@filesw
{\endlinechar-1
\makeatletter
\@input{\@bibunitname.aux}}%
\immediate\openout\@bibunitaux\@bibunitname.aux
\immediate\write\@bibunitaux{\string\bibstyle{\@localbibstyle}}%
\fi
}
\def\@finishstartedbibunit{%
\if@filesw
\immediate\closeout\@bibunitaux
\fi
\ifx\bibunits@rerun@warning\@empty
\if@filesw
{\endlinechar-1
\makeatletter
\let\@namedef\@xtestdef
\@input{\@bibunitname.aux}}%
\fi
\fi
}
\makeatother
\defaultbibliographystyle{apalike}
\defaultbibliography{\jobname}
\DeclareAcronym{ITCZ}{
short = ITCZ,
long = Intertropical Convergence Zone
}
\begin{filecontents}{\jobname.bib}
@BOOK{Smith_Lorem_1980,
AUTHOR = {John Smith},
TITLE = {Sit Amet},
YEAR = {1980},
PUBLISHER = {Knopf},
}
\end{filecontents}
\begin{document}
\begin{bibunit}
\acuse{ITCZ}
There has never been more \acl{ITCZ} \citep[\acs{ITCZ};][]{Smith_Lorem_1980}.
\lipsum
\putbib
\end{bibunit}
\end{document}