我注意到几个包之间存在一个有趣的冲突。我在数学模式中使用了符号gensymb，但这似乎在非常特殊的情况下导致了问题。这似乎适用于任何文档类。
当我在以下任何包上调用\usepackage{nicematrix}之前\usepackage{gensymb}和之后调用时： ，我在尝试将符号放入数学模式时遇到问题。错误显示或。\usepackage(textcomp,xfrac,chemmacros)gensymb"\textfont 4 is undefined (character W). $\ohm$""\textfont 4 is undefined (character �). $\degree$"
我刚刚更新到 TeX Live 2023（完整方案）并使用 tlmgr 更新了我的软件包。但是我在 2022 版本中也遇到了同样的问题。
附件是一个最小工作示例。
\documentclass{article}
\usepackage{nicematrix}
\usepackage{gensymb}
%Add any of these three packages and the gensymb symbols (\degree,\ohm) do not work in math mode if nicematrix is situated before gensymb. If nicematrix is placed after gensymb, no problems arise.
\usepackage{textcomp}
%\usepackage{xfrac}
%\usepackage{chemmacros}
\begin{document}
\degree
$\degree$
\ohm
$\ohm$
\end{document}
我已经找到了一种解决方法\usepackage{nicematrix}，\usepackage{gensymb}但我很感兴趣是否有人知道是什么导致了这个问题。
这也是完整的日志输出：
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File: epstopdf-sys.cfg 2010/07/13 v1.3 Configuration of (r)epstopdf for TeX Liv
e
))
\symgns@font=\mathgroup4
LaTeX Font Info: Overwriting symbol font `gns@font' in version `bold'
(Font) TS1/cmr/m/n --> TS1/cmr/b/n on input line 12.
Package gensymb Info: Math companion symbols declared on input line 12.
LaTeX Info: Redefining \degree on input line 12.
LaTeX Info: Redefining \celsius on input line 12.
Package gensymb Info: Using text companion symbols for \degree, \celsius and \p
erthousand on input line 12.
LaTeX Info: Redefining \ohm on input line 12.
Package gensymb Info: Using \textohm for \ohm on input line 12.
Package gensymb Info: Using \textmu for \micro on input line 12.
! \textfont 4 is undefined (character �).
l.14 $\degree$
Somewhere in the math formula just ended, you used the
stated character from an undefined font family. For example,
plain TeX doesn't allow \it or \sl in subscripts. Proceed,
and I'll try to forget that I needed that character.
! \textfont 4 is undefined (character W).
l.17 $\ohm$
Somewhere in the math formula just ended, you used the
stated character from an undefined font family. For example,
plain TeX doesn't allow \it or \sl in subscripts. Proceed,
and I'll try to forget that I needed that character.
[1
{/usr/local/texlive/2023/texmf-var/fonts/map/pdftex/updmap/pdftex.map}{/usr/loc
al/texlive/2023/texmf-dist/fonts/enc/dvips/cm-super/cm-super-ts1.enc}]
(build/testitesti.aux) )
Here is how much of TeX's memory you used:
11783 strings out of 476017
263900 string characters out of 5789774
1850666 words of memory out of 5000000
32087 multiletter control sequences out of 15000+600000
513076 words of font info for 35 fonts, out of 8000000 for 9000
1141 hyphenation exceptions out of 8191
87i,6n,90p,431b,110s stack positions out of 10000i,1000n,20000p,200000b,200000s
</usr/local/texlive/2023/texmf-dist/fonts/type1/public/
amsfonts/cm/cmr10.pfb></usr/local/texlive/2023/texmf-dist/fonts/type1/public/cm
-super/sfrm1000.pfb>
Output written on build/testitesti.pdf (1 page, 12159 bytes).
PDF statistics:
22 PDF objects out of 1000 (max. 8388607)
14 compressed objects within 1 object stream
0 named destinations out of 1000 (max. 500000)
13 words of extra memory for PDF output out of 10000 (max. 10000000)
答案1
编辑：此错误nicematrix已在 6.18 2023-04-19 版本中解决。
原因是使用了特定的实现nicematrix细节（为了检测空单元格 --- 即某些类型的列中单元格之间仅有空格）。{array}array&
为了检测是否{array}已被更改，进行了测试（通过在文档开头的草稿框中编写一个小表格）。
这就是不兼容的根源。也许我会在以后的版本中删除该测试（我不确定这是不是个好主意）。
目前，在加载时有一个键可以禁用该测试：
\usepackage[no-test-for-array]{nicematrix}
\documentclass{article}
\usepackage[no-test-for-array]{nicematrix}
\usepackage{amsmath}
\usepackage{gensymb}
%Add any of these three packages and the gensymb symbols (\degree,\ohm) do not work in math mode if nicematrix is situated before gensymb. If nicematrix is placed after gensymb, no problem arises.
\usepackage{textcomp}
%\usepackage{xfrac}
%\usepackage{chemmacros}
\begin{document}
\degree
$\degree$
\ohm
$\ohm$
\end{document}
我将（至少）在的文档中添加一个警告nicematrix。
感谢您的反馈。