doesn't work with mkiv \definehead[SSEC][subsection] \starttext foo \stoptext ! LuaTeX error ...text/tex/texmf-context/tex/context/base/strc-mar.lua:171: attempt to index global 'setting' (a nil value) stack traceback: ...text/tex/texmf-context/tex/context/base/strc-mar.lua:171: in function 'define' <main ctx instance>:1: in main chunk. <argument> ...e("SSEC",{ parent = "subsection" })} \getparameters [\??mk SSEC... \secondoftwoarguments #1#2->#2 <argument> ...n]\definemarking [SSEC] [subsection] \definemarking [SSEC\v!num... \secondoftwoarguments #1#2->#2 \dodefineclonedstructurehead ...!prefix =\v!no ]}} \the \everystructureheadse... \next1 ...dododefinestructurehead {subsection}{#1} \doprocesscommaitem ... l.1 \definehead[SSEC][subsection] Herbert