Hi Hans, There is a missing \endcsname in the latest ConTeXt ver: 2006.11.20 11:37 MK II fmt: 2006.11.20 int: english/english %----------------------------------------- \definehead[Topic] \starttext \Topic{test} \stoptext %----------------------------------------- gives me ! Missing \endcsname inserted. <to be read again> \@@kosection <argument> \??se \@@sectie \s!start \letgvalueempty ...al \expandafter \let \csname #1 \endcsname \empty \@@setsectionnumber ...ueempty {\??se #1\s!start } \setcounter {\??se #1}{#2}... \dosetupheadnumber ...tionnumber \@@sectie {#2#3}} \egroup \findsectionnumber ...r [#1][\foundsectionnumber ] \setupheadnumber [#1][-1] ... l.6 \Topic{test} ? Aditya