[Ethereal-users] Help please: Gtk-WARNING **: cannot open display:

[Peter Teeson]

I have a G4 QuickSilver (2001) running Mac OS X 10.2.6. I installed 
ethereal 0.9.13-1 using Fink Commander.
In Terminal when I type ethereal (as suggested in the man page) all I 
get is
Gtk-WARNING **: cannot open display:.

The warning message occurs no matter which display is made the main one.
I have two displays on the G4 -
(0) an Apple 17" LCD Studio Display and
(1) a 19" CRT Samsung SyncMaster 950p.
The video card is the standard one supplied by Apple - NVidia Geforce2 
Twin View to which both displays are connected.

Please point me at the correct documentation to help track this down as 
I know nothing about GTK+ (except that it is a library). Seems like I 
need to do some configuring here.

I am comfortable enough with a command line approach even though Unix 
is a long ago memnory (which is becoming rapidly refreshed) ;-}

TIA and
respect....
Peter