Hey list, 2013.09.18 appears to be broken. When typesetting my book, I receive the following fatal error... ! LuaTeX error /usr/share/texmf/tex/context/base/font-syn.lua:596: bad argument #2 to 'f_a' (number expected, got string) stack traceback: [C]: in function 'f_a' /usr/share/texmf/tex/context/base/font-syn.lua:596: in function 'collectstatistics' /usr/share/texmf/tex/context/base/font-syn.lua:1071: in function 'identify' /usr/share/texmf/tex/context/base/font-syn.lua:1089: in function 'load' /usr/share/texmf/tex/context/base/font-syn.lua:1100: in function 'load' /usr/share/texmf/tex/context/base/font-syn.lua:1259: in function 'resolvedspecification' /usr/share/texmf/tex/context/base/font-syn.lua:1269: in function 'resolve' /usr/share/texmf/tex/context/base/font-syn.lua:1678: in function 'exists' ...re/texmf/tex/context/third/simplefonts/t-simplefonts.lua:182: in function 'selectfont' [string "\directlua "]:1: in main chunk. \syst_helpers_comma_list_step ...ter \c!weight ")} \9>>1 #1,e-\syst_helpers_comma_list_step {#1} \syst_helpers_do_process_comma_... <argument> \relax regular, italic,slanted,bold,bolditalic,boldslanted,caps, italiccaps,slan \syst_helpers_do_process_comma_list ...argument #1 ,]\relax \global \advance ... \simplefonts@definetextfont ...rocesscommacommand \ifx \currenttypeface \v!s... \syst_helpers_quadruple_empty_four_spaced ...4}][] ... l.397 \setupbodyfont[11pt] It looks as though the problem is buried in line 596 of font-syn.lua. For some reason s.angle is typed as a Lua string and not a number. local angle = f_a(s.angle or 0) -- Kip Warner -- Software Engineer OpenPGP encrypted/signed mail preferred http://www.thevertigo.com