> Once a 'open Unix' directive has been called I get the following compilation 
> conflict:
> 
> flush stdout;;
>       ^^^^^^
> This expression has type Unix.file_descr but is here used with type out_channel

You should explicitely name stdout Pervasives.stdout, not to confuse
with Unix.stdout.

Pierre Weis

INRIA, Projet Cristal, Pierre.Weis@inria.fr, http://pauillac.inria.fr/~weis/