Re: [Swarm-Support] Error: TkExtra (instance)

[Bill Northcott]

> I am trying to run example demos of swarm. I am getting the
> following error..

> $ java BatchDemo
> error: TkExtra (instance)

I think this is caused because either you have no running X-server or your 
DISPLAY environment variable is not set. When Tk tries to set up a window 
it dies because the server is not available.
Try running some other X-Windows software like xterm or xeyes.

Bill Northcott