[NTG-context] Equilibrium in chemical resulted in Undefined Control Sequence error

11 Oct 2011

      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}

?

[NTG-context] Equilibrium in chemical resulted in Undefined Control Sequence error

Hongwen Qiu