This works with the 20191028 LMTX beta, fails with the 20191028 MkIV beta: \starttext This\footnote{that} \stoptext Error log: return { ["filename"]="c:/Users/micro/Desktop/fn.tex", ["lastcontext"]="\n<inserted text> ...s \\inheritmaintextcolor \\strc_itemgroups_push \n \n\\handlenoteinsert ...tes_synchronize \\the \\everybeforenoteinsert \n \\insert \\currentnoteinsert...\n\\235>notation:note ...enoteinsert \\currentnote \\currentnotenumber \n \\fi \\fi \\fi \\endgroup \\fi ...\n\\m_syst_action_nop ...dler \\currentconstructionhandler \\endcsname \n \\strc_constructions_finali...\nl.2 This\\footnote{that}\n ", ["lastluaerror"]="?", ["lasttexerror"]="! Undefined control sequence", ["linenumber"]=2, ["offset"]=10, } Can anyone reproduce this? I have tried rebuilding. -- Rik