I'm trying to run one of the examples of fonts-mkiv.pdf I copied the code from 4.5 Lua fonts to a file "fonts-demo-rule.lua". This lua file is in the same directory as my test file. Then I tried \definefont [MyRuleFont] [file:fonts-demo-rule.lua*default sa 1] \starttext {\MyRuleFont So when we use it we get text } \stoptext but I get in the log fonts > defining > forced type 'lua' of 'fonts-demo-rule' not found fonts > defining > font with asked name 'fonts-demo-rule' is not found using lookup 'file' fonts > defining > unknown font 'fonts-demo-rule', loading aborted fonts > defining > unable to define 'fonts-demo-rule.lua' as 'MyRuleFont--0' The file itself is found (I can see its path later on). What is going on here? -- Ulrike Fischer http://www.troubleshooting-tex.de/