Hi. First of all: mkii format generation still fails here because of [context.mkii] \loadmkiifile{core-swd} I added the mkii suffix here to make it run. ---- Back to the subject. When using mkiv there is a problem in finding the map files of my fonts. Instead of the expanded value of \defaultencoding (here texnansi, set in cont-sys.tex) the prefix 'default' is used here. [..] fonts : using map file: default-microsoft-arial luaTeX warning (file default-microsoft-arial.map): cannot open font map file fonts : using map file: default-microsoft-sansserif luaTeX warning (file default-microsoft-sansserif.map): cannot open font map file fonts : using map file: default-microsoft-trebuchet luaTeX warning (file default-microsoft-trebuchet.map): cannot open font map file fonts : using map file: default-microsoft-tahoma luaTeX warning (file default-microsoft-tahoma.map): cannot open font map file ---- Mkii works fine with these fonts (TTF). I made a small test file, but I'm not sure if the font is choosen wisely (T1). Anyhow, it shows the way how I use the upper named fonts in my macros. Regards, Peter \usetypescriptfile[type-cow] \usetypescript[all][cow][default] \usetypescript[cow][default] \definefont [TestFont] [Cows at 40pt] \starttext {\TestFont Just a test.} \stoptext