\starttext \startuseMPgraphic{dummy} fill fullcircle scaled 5cm withcolor red ; \stopuseMPgraphic \useMPgraphic{dummy} \stoptext
Well, I get nothing on my setup as well as if I use the online compiler. Therefore I assume that something must be wrong. Could you comment on that?
This is because, by default, write18 is disabled in texlive. You can either enable it (see the wiki for details) or add
\runMPgraphicsfalse
on top of your file.
Thank you, Aditya, that was it. I have added 'mpost' to 'shell_escape_commands' in texmf.conf file. If it is possible, I would appreciate a warning that a shell command has not been escaped. I had no clue what might gone wrong. And last but not least, do you think that metapost can be a security threat? Because if not, I will write to TeXLive packagers to allow escaping of the 'mpost' command. Regards, Matej