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style="font-family: Lucida Sans;">Thank you.<br>Actually, I found up
that it is the update of the package graphics that broke the use of
color, that was previously known to work with eplain. I reverted
graphics to the previous version and color works again.<br>Regards,<br><br>Gérald<br><br><span>David
Carlisle a écrit le 13/6/22 à 13:00 :</span><br><blockquote type="cite"
cite="mid:CAEW6iOj1pSaU8BV8jjEU3+mg-H2sJwxsdU+gtN_yhX1QWsB+sA@mail.gmail.com"><meta
http-equiv="content-type" content="text/html; charset=utf-8"><div
dir="ltr"><div><br></div><div>You should I
think be able
to add</div><div><br></div><div><br>\ifx\mathcolor\@undefined<br> %
simplified version of \mathcolor<br>
\protected\def\mathcolor{\begingroup\@ifnextchar[\mlx@mathcolora\mlx@mathcolorb}<br>
\long\def\mlx@mathcolora[#1]#2#3{\color[#1]{#2}#3\endgroup}<br>
\long\def\mlx@mathcolorb#1#2{\color{#1}#2\endgroup}<br>\fi</div><div><br></div><div>
to
the end of miniltx.ltx If
that works for your real documents I'll arrange an update at
ctan <br></div><div><br></div><div>David<br></div><div><br></div></div><br><div
class="gmail_quote"><div dir="ltr" class="gmail_attr">On Mon, 13 Jun
2022 at 10:56, Gérald Tenenbaum <<a href="mailto:gerald.ten@free.fr"
moz-do-not-send="true">gerald.ten@free.fr</a>> wrote:<br></div><blockquote
class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px
solid rgb(204,204,204);padding-left:1ex"><div style="font-family:Lucida
Sans"><div style="font-family:Lucida Sans">Hello,<br><br>Here is a small
file
that used to work but doesn't anymore:<br><br>\input eplain<br>\beginpackages<br>\usepackage{color}<br>\endpackages
<br>\long\def\red#1{{\color{red}#1}}<br>\red{ab}<br>\bye<br><br><br>The
error message is:<br><br>This is pdfTeX, Version
3.141592653-2.6-1.40.24 (TeX Live 2022) (preloaded format=pdftex)<br> restricted
\write18 enabled.<br>entering extended mode<br>(./essai.tex
(/usr/local/texlive/2022/texmf-dist/tex/eplain/eplain.tex)<br>(/usr/local/texlive/2022/texmf-dist/tex/plain/graphics-pln/miniltx.tex)<br>(/usr/local/texlive/2022/texmf-dist/tex/latex/graphics/color.sty<br>(/usr/local/texlive/2022/texmf-dist/tex/latex/graphics-cfg/color.cfg)<br>(/usr/local/texlive/2022/texmf-dist/tex/latex/graphics-def/pdftex.def)<br>(/usr/local/texlive/2022/texmf-dist/tex/latex/graphics/mathcolor.ltx<br>/usr/local/texlive/2022/texmf-dist/tex/latex/graphics/mathcolor.ltx:21:
Undefined control sequence.<br>l.21 \ExplSyntaxOn<br><br>Many thanks
for help.<br>Regards,<br><br>Gérald<br></div></div></blockquote></div></blockquote><br></div></body></html>