Hi everybody, I might have spotted a problem related to enumerations. The minimal example below results in the given error message. It works without the "closesymbol" option. Thanks for your help. Cheers, Andreas % ### MINIMAL EXAMPLE ### (ConTeXt ver: 2012.02.18 10:50 MKIV fmt: 2012.2.19) \defineenumeration[myproof][text=Proof,closesymbol={\mathematics{\square}}] \starttext \startmyproof This is a proof \stopmyproof \stoptext % ####################### % ### ERROR MESSAGE #### <to be read again> \normalstartimath \mathematics ...ifmmode #1\else \normalstartimath #1\normalstopimath \fi \strc_constructions_close_symbol_place ...esymbol \fi \fi \140>construction ...tructions_close_symbol_place \doifnot {\constructionpar... \140>enumeration ...er \v!construction \endcsname \endgroup l.5 \stopmyproof % #######################