Hi, I tried to use the cwTeX fonts with MkIV and I can use them but ConTeXt is not able to save the font data and read the font for every run, this did work but it takes quiet some time to do this. A attached the result from the terminal and the log file. The font are available from the following page: http://cle.linux.org.tw/fonts/cwttf/baseline/ My example document is: % engine=luatex \definefont[cwheib][file:cwheib*default at 12pt] \starttext \cwheib cwTeXHeiBold \stoptext Wolfgang