On Oct 29, 2008, at 3:12 PM, Alan BRASLAU wrote:

> I forgot to add the error message:
> ...
> fonts          : using map file: cbgreek
>
> luaTeX warning (file cbgreek.map): cannot open font map file
> ...
>
> Alan
>
> On Wednesday 29 October 2008 15:05:41 Alan BRASLAU wrote:
>> Hello,
>>
>> What needs to be done to include greek fonts on top of the minimal
>> installation? Thank you.
>>
>> example:
>> \usemodule[greek]
>> \starttext
>> \greek{kalamos}
>> \stoptext
>

Well, it does say in a pretty obvious manner: you'll need to install
the cbgreek fonts, including the map file. However, I'm not sure it
will work OOTB; the cbgreek fonts have changed a bit, and s-grk-00.tex
isn't really maintained (file date is Oct. 2004). If you're using
luatex, you don't really need this module anyway; you simply choose a
font which has Greek characters and input in Unicode Greek.