gdct313 can't open display

[Jack <mauro.giacchini@lnl.infn.it>]

I have just upgraded my Solaris machine to solaris 8.
When I run gdct313 from a remote xterminal I get the message 

can't open DISPLAY

if I specify the node name in the DISPLAY variable (instead of the
default number) I get

res_init: socket: Invalid argument
can't open DISPLAY

instead.

On the host machine's terminal this runs fine.  On the remote terminal I
can run xterm and other xapps (medm, probe, etc) so security should not be the problem.
Has anyone else seen this?

Thanks,
Mauro
Italy.