gethostbyname- Error 0

[cattel@iit.nrc.ca (Cattel)]

Mail*Link(r) SMTP               gethostbyname: Error 0
Hello,

1) Pb with Centaur 1.2
I installed Centaur1.2 sometimes ago and it worked well.
To-day I got a similar pb to Regine Freitag's (19 May 93)
When I try to read a file writen in one of my formalisms. 
Follows the log of the session. 
Is it the same pb, what is the cure ?

--------- log ------------------

; Le-Lisp (by INRIA) version 15.24 ( 2/Janv/91)   [sun4OS4]
gethostbyname: Error 0
                      MU-Prolog 3.2 - Typol $Revision: 1.1 $

TYPOL : tables read.
error : tables read.
** loadmodule : load interpreted module : contrib/Exp/environment
** loadmodule : load interpreted module : centaur/tables/Spec/environment
** loadmodule : load interpreted module : centaur/tables/Graph/environment
** loadmodule : load interpreted module : centaur/tables/Conic/environment
** loadmodule : load interpreted module : centaur/tables/VDM/environment
VDM : tables read.
Centaur v1.2p1 (2.51.41.67) centaur - Mon Sept 28 92 08:08:39
= ()
? gethostbyname: No such file or directory
Restarting locally: server -wait -name Spec
/sms/cattel/cattel/centaur/tables/Spec/syntax/m
etal//Spec
** #:io:client:open-spawn-server-if-needed : Wrong hostname or port returned :
gethostbynam
e: Error 0

= ()
?
---------- end log ---------

2) Question : does Centaur work without any pb either with X11R4, X11R5,
Openwindow3.0 ?

Thanks in advance

Thierry CATTEL