Hi. Installation: http://wiki.contextgarden.net/Ubuntu#With_ConTeXt_Standalone_.E2.80.93_shoul... Font (OTF): https://www.google.com/fonts/specimen/Source+Sans+Pro = MWE (test.tex) = \definefont[VersionFont][name:sourcesanspro] \starttext \VersionFont Hello, World \stoptext = EOF = = LOG FILE (test.log) = system > callbacks > not registering frozen 'find_format_file' open source > 1 > 1 > /usr/local/context/tex/texmf-context/tex/context/base/cont-yes.mkiv ConTeXt ver: 2015.11.19 19:13 MKIV beta fmt: 2015.12.2 int: english/english system > 'cont-new.mkiv' loaded open source > 2 > 2 > /usr/local/context/tex/texmf-context/tex/context/base/cont-new.mkiv close source > 2 > 2 > /usr/local/context/tex/texmf-context/tex/context/base/cont-new.mkiv system > files > jobname 'test', input './test', result 'test' fonts > latin modern fonts are not preloaded languages > language 'en' is active open source > 2 > 3 > /tmp/test.tex fonts > preloading latin modern fonts (second stage) fonts > 'fallback modern-designsize rm 12pt' is loaded fonts > defining > source file 'SourceSansPro-Regular.ttf' is not found backend > xmp > using file '/usr/local/context/tex/texmf-context/tex/context/base/lpdf-pdx.xml' pages > flushing realpage 1, userpage 1 close source > 2 > 3 > /tmp/test.tex close source > 1 > 3 > /usr/local/context/tex/texmf-context/tex/context/base/cont-yes.mkiv !LuaTeX error: cannot find OpenType font file for reading () ==> Fatal error occurred, no output PDF file produced! = EOF = = MTXRUN = $ mtxrun --script fonts --list -all sourcesanspro sourcesanspro sourcesansprosemiboldit /usr/local/share/fonts/google/s/SourceSansPro-SemiboldItalic.ttf = EOT = I also noticed that there's a luatex-cache directory in $HOME, which is strongly undesirable. (It should be $HOME/.luatex-cache, or reside under /var/.) Any ideas on why the font cannot be found? This was working until I upgraded ConTeXt last night. Thank you.