It appears that the newotf mechanism does not handle .ttc fonts. The
following MWE uses fonts found on Windows 8.1:
\usemodule [newotf]
%% the following fonts, all .ttc, fail in the same way:
% C:/ConTeXt/tex/texmf-context/tex/context/base/font-oup.lua:651:
bad argument #1 to '(for generator)' (table expected, got nil)
%\definefont [testfont] [MSMincho sa 1]
%\definefont [testfont] [MingLiU sa 1]
%\definefont [testfont] [Gulim sa 1]
%\definefont [testfont] [Batang sa 1]
%\definefont [testfont] [msyh sa 1] % Microsoft YaHei
%\definefont [testfont] [msjh sa 1] % Microsoft JhengHei
%\definefont [testfont] [SimSun sa 1]
%% the following, none .ttc, work:
%\definefont [testfont] [arialuni sa 1] % Arial Unicode MS
%\definefont [testfont] [yugothic sa 1] % Yu Gothic
%\definefont [testfont] [yumin sa 1] % Yu Mincho
%\definefont [testfont] [kaiu sa 1] % DFKai-SB Regular
%\definefont [testfont] [simfang sa 1] % FangSong Regular
%\definefont [testfont] [simhei sa 1] % SimHei Regular
\definefont [testfont] [simkai sa 1] % KaTi Regular
\starttext
Confucius’ {\em Analects} ({\testfont 論語} {\em LunYu}).
\stoptext
Without the new module, this works with all of the test fonts.
--
Rik
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