Le jeudi 22/04/10 à 16h42,
Hans Hagen <pra...@wxs.nl> a écrit :
> so use the [][] variant instead ({}{} is for inline)
OK, that's better :) But the following MCE:
\documentclass{article}
\usepackage{etex,m-pictex,m-ch-en}
\begin{document}
\startchemical
\chemical[2H_2,PLUS,O_2,GIVES,2H_2O]
\stopchemical
\end{document}
leads to the messages:
ppchtex : unknown chemical definition 2H_2
ppchtex : unknown chemical definition O_2
ppchtex : unknown chemical definition 2H_2O
and, indeed, only the "+" sign and the arrow are printed.
Thanks.
--
Denis
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