Version information: ConTeXt ver: 2016.04.30 18:59 MKIV beta fmt: 2016.4.30 int: english/english luajittex, 0.95.0 and luatex, 0.95.0 running on Windows 10 x64 Error message: error: ...eXt/tex/texmf-context/tex/context/base/mkiv/font-otj.lua:1205: attempt to index local 'i' (a nil value) tex error > tex error on line 7 in file C://Users/rik/Desktop/comp_body.tex: ? Code: \setupdirections [bidi=global] \definefont [hebrew] [default] [lang=heb,ccmp=yes,script=hebr] \definefont [Hebrew] [sileotsr*hebrew sa .9] \starttext \startparagraph Hebrew : {\Hebrew רִ} \stopparagraph \stoptext When the first line is removed, or the value of bidi changed to on, no error is thrown. A single-font version of the code, for fonts that have Hebrew glyphs, fails with some fonts (libertine shown below), but works with others, for example, dejavu sans. Code: \setupdirections [bidi=global] \setupbodyfont[libertine] \starttext \startparagraph Hebrew : רִ \stopparagraph \stoptext My installation, or is this a bug? -- Rik Kabel