Graphics in Windows v.3.0.0 don't work for me

[Allen.Windhorn]

I just installed version 3.0.0 under Windows XP from the SourceForge
site, and graphs don't work.  I installed using defaults (including the
Java graphics package).  Should I re-install selecting Gnuplot instead?
Or is there something I need to add?

Thanks for any help you can give.  Following is the error message:

GNU Octave, version 3.0.0
Copyright (C) 2007 John W. Eaton and others.
...
Octave was configured for "i686-pc-msdosmsvc".
...
warning: unable to set default graphics backend

octave.exe:1> t = [0:0.2:6.283];
octave.exe:2> y = sin(t);
octave.exe:3> plot(t,y)
warning: get: invalid property `type'
error: `s1' undefined near line 42 column 17
error: evaluating argument list element number 1
error: evaluating binary operator `||' near line 42, column 21
error: evaluating binary operator `&&' near line 42, column 39
error: if: error evaluating conditional expression
error: evaluating if command near line 42, column 5
error: evaluating if command near line 41, column 3
error: called from `strcmpi' in file `C:\Program
Files\Octave\share\octave\3.0.0\m\strings\strcmpi.m'
error: evaluating argument list element number 1
error: if: error evaluating conditional expression
error: evaluating if command near line 39, column 9
error: evaluating while command near line 34, column 7
error: evaluating if command near line 25, column 5
error: evaluating if command near line 20, column 3
error: called from `ancestor' in file `C:\Program
Files\Octave\share\octave\packages\jhandles-0.2.0\ancestor.m'
error: evaluating argument list element number 1
error: evaluating if command near line 30, column 3
error: called from `axes' in file `C:\Program
Files\Octave\share\octave\3.0.0\m\plot\axes.m'
error: evaluating assignment expression near line 45, column 9
error: evaluating if command near line 44, column 5
error: evaluating if command near line 42, column 3
error: called from `gca' in file `C:\Program
Files\Octave\share\octave\3.0.0\m\plot\gca.m'
error: evaluating assignment expression near line 59, column 4
error: evaluating if command near line 56, column 7
error: evaluating if command near line 55, column 5
error: evaluating if command near line 35, column 3
error: called from `__plt_get_axis_arg__' in file `C:\Program
Files\Octave\share\octave\3.0.0\m\plot\__plt_get_axis_arg_
_.m'
error: called from `plot' in file `C:\Program
Files\Octave\share\octave\3.0.0\m\plot\plot.m'
error: `java_invoke' undefined near line 20 column 9
error: evaluating assignment expression near line 20, column 7
error: called from `__get_object__' in file `C:\Program
Files\Octave\share\octave\packages\jhandles-0.2.0\__get_object__
.m'
error: evaluating assignment expression near line 22, column 9
error: evaluating if command near line 21, column 3
error: called from `drawnow' in file `C:\Program
Files\Octave\share\octave\packages\jhandles-0.2.0\drawnow.m'

Regards,
Allen
-- 
Allen Windhorn, P.E. (MN)  (507) 345-2782
Kato Engineering
P.O. Box 8447, N. Mankato, MN  56002
address@hidden