Hans, I updated my ConTeXt (by rerunning first-setup.sh and remaking the format files), but I get the following error when compiling your code. Troy LuaTeX warning: lua-loaded font [72] (MathSymbol-Regular) has no characters! ! LuaTeX error ...mals/tex/texmf-context/tex/context/base/font-def.lua:539: attempt to index field 'parameters' (a nil value) stack traceback: ...mals/tex/texmf-context/tex/context/base/font-def.lua:539: in function 'register' ...mals/tex/texmf-context/tex/context/base/font-ctx.lua:386: in function 'command_2' <main ctx instance>:1: in main chunk. \lowleveldefinefont ...lax , "\relativefontid " )} \edef \somefontspec {at \s... \xxdododefinefont ...efont {#4}\newfontidentifier \fi \csname \newfontidenti... \dodosetmathfamily ...\currentmathsize \endcsname \else \ifcsname \fontclass... \dosetmathfamily ...athfamily \scriptscriptfont #1 \let \currentmathsize \!!p... <inserted text> ... \dosetmathfamily \msfam \c!ms \fi \synchronizemath ...athfonts \the \mathstrategies \fi ... l.39 ...script[modern] \setupbodyfont[modern,10pt] ?