[NTG-context] [ppchtex] \normalifx: Undefined control sequence

Denis Bitouzé dbitouze at wanadoo.fr
Thu Apr 22 19:09:31 CEST 2010

Le jeudi 22/04/10 à 16h51,
Denis Bitouzé <dbitouze at wanadoo.fr> a écrit :

> 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:
> [...]

Well, the following one:


is actually OK!

What is strange is that ppchtex \chemical formulas used to be inserted
between \startchemical and \stopchemical... Moreover, the following:


works only with \startchemical and \stopchemical.

Are those changes: 

  1. {}{} rather than [][],

  2. pair \startchemical, \stopchemical or not,

  3. etc.

documented somewhere?


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