Hello, Making the colon active results in errors when using colons in formula labels. Example: \useencoding[ffr] \mainlanguage [fr] \starttext \placeformula[eq:foo] \startformula a = 0 \stopformula \stoptext Log: TeXExec 5.0 - ConTeXt / PRAGMA ADE 1997-2004 [...] ConTeXt ver: 2004.10.19 fmt: 2004.10.23 int: english mes: english [...] ! Undefined control sequence. <argument> \discretionarytoken \convertargument #1\to #2->\dodoglobal \edef #2 {\detokenize {#1}} \directdiscretionary ...#1\to \discretionarytoken \let \textmodediscretionar... <argument> eq: foo \doifelse #1#2->\edef \!!stringa {#1 }\edef \!!stringb {#2}\ifx \!! stringa \!... \dodoplaceformula [#1]#2->\doifelse {#1}{-} {\setfalse \handleformulanumber ... ... l.5 \startformula Thanks for any help, David Munger