Hi,when you pass a undefined argument to \lfence (or \rfence and \mfence) you get the "unknown" alternative
\setvalue{\??mathleft \s!unknown}{\setfalse\c_math_fenced_done\ifconditional\c_math_fenced_unknown\normalleft \nexttoken\fi}
which doesn’t work here because \nexttoken is never set by \lfence but only by \left.
Wolfgang _______________________________________________ dev-context mailing list dev-context@ntg.nl http://www.ntg.nl/mailman/listinfo/dev-context
