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 ___________________________________________________________________________________ If your question is of interest to others as well, please add an entry to the Wiki! maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context webpage : http://www.pragma-ade.nl / http://tex.aanhet.net archive : http://foundry.supelec.fr/projects/contextrev/ wiki : http://contextgarden.net ___________________________________________________________________________________