我最近注意到 diffcoeff 和 mhchem 包之间存在冲突。对于此文件：
\documentclass[12pt]{article}
\usepackage[utf8]{inputenc}
\usepackage[T1]{fontenc}
\usepackage{diffcoeff}
\usepackage[version=4]{mhchem}
\listfiles
\begin{document}
\printFileList
Test
\end{document}
.log 文件是
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Package: diffcoeff 2016/06/27 v1.0 Write differential coefficients easily.
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\openout1 = `Test.aux'.
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! Missing number, treated as zero.
<to be read again>
\relax
l.7 \begin{document}
A number should have been here; I inserted `0'.
(If you can't figure out why I needed to see a number,
look up `weird error' in the index to The TeXbook.)
! Argument of \__iow_wrap_break_none:w has an extra }.
<inserted text>
\par
l.7 \begin{document}
I've run across a `}' that doesn't seem to match anything.
For example, `\def\a#1{...}' and `\a}' would produce
this error. If you simply proceed now, the `\par' that
I've just inserted will cause me to report a runaway
argument that might be the root of the problem. But if
your `}' was spurious, just type `2' and it will go away.
Runaway argument?
! Paragraph ended before \__iow_wrap_break_none:w was complete.
<to be read again>
\par
l.7 \begin{document}
I suspect you've forgotten a `}', causing me to apply this
control sequence to too much text. How can we recover?
My plan is to forget the whole thing and hope for the best.
)
Runaway argument?
76543210\q_stop end \exp_args:NNf \group_end: \iow_log:n {\tl_to_str:N \ETC.
! File ended while scanning use of \__iow_wrap_end_chunk:w.
<inserted text>
\par
<*> Test.tex
I suspect you have forgotten a `}', causing me
to read past where you wanted me to stop.
I'll try to recover; but if the error is serious,
you'd better type `E' or `X' now and fix your file.
! Emergency stop.
<*> Test.tex
*** (job aborted, no legal \end found)
Here is how much of TeX's memory you used:
11477 strings out of 492640
217923 string characters out of 6129336
271481 words of memory out of 5000000
15377 multiletter control sequences out of 15000+600000
533400 words of font info for 26 fonts, out of 8000000 for 9000
1141 hyphenation exceptions out of 8191
41i,1n,63p,344b,275s stack positions out of 5000i,500n,10000p,200000b,80000s
No pages of output.
感谢您的任何帮助。
答案1
问题出现在diffcoeff设置一个名为的宏\msg_info_text:n时
\cs_gset:Npn \msg_info_text:n #1
{ Use~the~order-override~option~to~specify~the~overall~order~of~
differentiation~(or~use~diffcoeffx.sty). }
而默认情况下它要短得多和通用。它旨在允许语言消息的更改，也可供单个包使用。（它生成Package X Info来自的消息的文本expl3。）
在 的消息代码中expl3，有一个假设会\msg_info_text:n产生比整行更短的内容。在这里，情况不再如此，目前内部没有针对此问题的健全性检查。我会添加一个，并将问题报告给 的维护者diffcoeff。目前，添加
\ExplSyntaxOn
\cs_set:Npn \msg_info_text:n #1 { \__msg_text:nn {#1} { Info } }
\ExplSyntaxOff
线路加载后diffcoeff。