Dear Hans, I can’t believe it! After updating ConTeXt, all the errors are disappeared! Here is the beginning of the log file before updating: … This is LuaTeX, Version 1.0.3 (TeX Live 2017/dev) system commands enabled. open source > level 1, order 1, name '/Users/graph/ConTeXt/tex/texmf-context/tex/context/base/mkiv/cont-yes.mkiv' system > system > ConTeXt ver: 2017.01.27 14:39 MKIV beta fmt: 2017.2.16 int: english/english system > … This is the current one: "cont-yes.mkiv" This is LuaTeX, Version 1.0.3 (TeX Live 2017/dev) system commands enabled. open source > level 1, order 1, name '/Users/graph/ConTeXt/tex/texmf-context/tex/context/base/mkiv/cont-yes.mkiv' system > system > ConTeXt ver: 2017.03.02 22:23 MKIV beta fmt: 2017.3.11 int: english/english system > Thank you and have a nice weekend. Best regards, Dalyoung