我定期更新 ConTeXt。不幸的是，单位模块不起作用。
\usemodule[units]
\starttext
50 \Milli \Meter.
\stoptext
日志档案 ：
resolvers | formats | executing runner 'run luametatex format': /home/aviroum/context/tex/texmf-linux-64/bin/luametatex --jobname="./test-units.tex" --fmt=/home/aviroum/luametatex-cache/context/5fe67e0bfe781ce0dde776fb1556f32e/formats/luametatex/cont-en.fmt --lua=/home/aviroum/luametatex-cache/context/5fe67e0bfe781ce0dde776fb1556f32e/formats/luametatex/cont-en.lui --c:currentrun=1 --c:fulljobname="./test-units.tex" --c:input="./test-units.tex" --c:kindofrun=1 --c:maxnofruns=9 --c:synctex --c:texmfbinpath="/home/aviroum/context/tex/texmf-linux-64/bin"
system >
system > ConTeXt ver: 2022.07.27 17:56 LMTX fmt: 2022.7.29 int: english/english
system >
system > 'cont-new.mkxl' loaded
open source > level 1, order 1, name '/home/aviroum/context/tex/texmf-context/tex/context/base/mkxl/cont-new.mkxl'
system > beware: some patches loaded from cont-new.mkiv
close source > level 1, order 1, name '/home/aviroum/context/tex/texmf-context/tex/context/base/mkxl/cont-new.mkxl'
system > files > jobname './test-units', input './test-units.tex', result './test-units'
fonts > latin modern fonts are not preloaded
languages > language 'en' is active
system > synctex functionality is enabled, expect 5-10 pct runtime overhead!
open source > level 1, order 2, name './test-units.tex'
modules > 'units' is loaded
open source > level 2, order 3, name '/home/aviroum/context/tex/texmf-context/tex/context/modules/mkiv/m-units.mkiv'
close source > level 2, order 3, name '/home/aviroum/context/tex/texmf-context/tex/context/modules/mkiv/m-units.mkiv'
fonts > preloading latin modern fonts (second stage)
fonts > 'fallback modern-designsize rm 12pt' is loaded
tex error > tex error on line 20 in file ./test-units.tex: Undefined control sequence \undefined
<line 3.20>
50 \Milli
\Meter.
10
11
12 %%%%%%%%%%%%%%%%%%%%%
13 %%%%%%%%%%%%%%%%%%%%%
14 \starttext
15 %%%%%%%%%%%%%%%%%%%%%
16 %%%%%%%%%%%%%%%%%%%%%
17
18
19
20 >> 50 \Milli \Meter.
21
22
23 \stoptext
24 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
25 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
The control sequence at the end of the top line of your error message was never
\def'ed. You can just continue as I'll forget about whatever was undefined.
mtx-context | fatal error: return code: 1
答案1
这是m-units.mkiv开始的方式：
%D \module
%D [ file=m-units,
%D version=1997.03.19,
%D title=\CONTEXT\ Extra Modules,
%D subtitle=Scientific Units,
%D author={Hans Hagen \& Ton Otten},
%D date=\currentdate,
%D copyright={PRAGMA ADE \& \CONTEXT\ Development Team}]
%C
%C This module is part of the \CONTEXT\ macro||package and is
%C therefore copyrighted by \PRAGMA. See mreadme.pdf for
%C details.
\ifcase\contextlmtxmode\else\endinput\fi
%D Best use the built in unit handle!
意思是该模块拒绝在LMTX下输入。
最好听取它的建议，但你可以强制它加载：
\chardef\contextlmtxmode=0
\usemodule[units]
\chardef\contextlmtxmode=1
\starttext
50 \Milli \Meter.
\stoptext