Hi,
The following minimal example:
==================================
\starttext
\chemical{A,+,B,<->,AB}
\stoptext
==================================
gives the following error under context version: 2011.10.08 11:42,
luatex version beta-0.70.1-2011051918:
! Undefined control sequence.
system > tex > error on line 10 in file test.tex: Undefined
control sequence ...
1 \starttext
2
3 \chemical{A,+,B,<->,AB}
4
5 \stoptext
6
<argument> \xrightpverleftarrow
{}{}
\mathematics ...mmode #1\else \normalstartimath #1
\normalstopimath \fi
\@@cm::i:equilibrium ...\xrightpverleftarrow {}{}}
\enspace
l.10 \chemicalequilibrium
\inlinechemical ...emicals.inline(\!!bs #1\!!es )}
}
l.3 \chemical{A,+,B,<->,AB}
?
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