Hi, I am using ‘xits’ font as math font which was fine for at least 10 days ago. it is defined in ’type-imp-unfonts.mkiv’ under ..tex/context/fonts/mkiv/ \loadtypescriptfile[xits] … \definetypeface [unfonts] [\s!mm] [\s!math] [xits] Suddenly it is not located by ConTeXt. Here is a sample code and a part of its log file. Also, I’d like to know the most prefered math font for math people. Thank you for reading. Best regards, Dalyoung %%%%% \setupbodyfont[unfonts] \starttext This worked fine before. 이 전에는 잘 되었습니다. \startformula \int f(x) dx \stopformula $x^2 + y^2 = z^2$ \stoptext %%%%%%%%%%% log-file … This is LuaTeX, Version 1.05.0 (TeX Live 2017) 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: 2018.02.14 22:56 MKIV beta fmt: 2018.2.16 int: english/english … … fonts > defining > forced type 'otf' of 'xits-math' not found fonts > defining > font with asked name 'xits-math' is not found using lookup 'file' fonts > defining > unknown font 'xits-math', loading aborted fonts > defining > unable to define 'xits-math.otf' as 'unfonts-12pt-mm-mr--3' fonts > defining > forced type 'otf' of 'xits-math' not found fonts > defining > font with asked name 'xits-math' is not found using lookup 'file' fonts > defining > unknown font 'xits-math', loading aborted fonts > defining > unable to define 'xits-math.otf' as 'unfonts-12pt-mm-mr--2' fonts > defining > forced type 'otf' of 'xits-math' not found fonts > defining > font with asked name 'xits-math' is not found using lookup 'file' fonts > defining > unknown font 'xits-math', loading aborted fonts > defining > unable to define 'xits-math.otf' as 'unfonts-12pt-mm-mr--1' fonts > math: unset for global bodyfont unfonts at 12pt fonts > math: unset for global bodyfont unfonts at 12pt backend > xmp > using file '/Users/graph/ConTeXt/tex/texmf-context/tex/context/base/mkiv/lpdf-pdx.xml'