Dear Helin, I followed Taco's solution. http://archive.contextgarden.net/message/ 20070130.082837.4bc51f61.en.html In brief, 1. make a folder /usr/local/gwTeX/texmf.texlive/fonts/map/pdftex/context/ 2. copy all files in the folder /usr/local/gwTeX/texmf.texlive/fonts/map/dvips/lm/ to the folder /usr/local/gwTeX/texmf.texlive/fonts/map/pdftex/context/ 3. check the following(locate the lm-math.map file): kpsewhich lm-math.map if the output is /usr/local/gwTeX/texmf.texlive/fonts/map/pdftex/ context/lm-math.map, then, do ctxtools --dpx --force /usr/local/gwTeX/texmf.texlive Then new files will be in /usr/local/gwTeX/texmf.texlive/fonts/map/dvipdfm/context/ 4. you may need a permission for su. Doing the above process, all the warnings were gone. Good luck! Best regards, Dalyoung.