Equilibrium in chemical resulted in Undefined Control Sequence error
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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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Hongwen Qiu