Plot print problem

[Jonathan Webster]

Hello,

I now have Octave, version 3.0.1 running on a CentOS box upgraded to CentOS 5.3.
2.6.18-128.1.1.el5xen #1 SMP Wed Mar 25 18:54:34 EDT 2009 x86_64

At startup octave acknowledges
Octave was configured for "x86_64-redhat-linux-gnu".

If I start gnuplot from the bash prompt it proclaims

G N U P L O T
        Version 4.0 patchlevel 0
        last modified Thu Apr 15 14:44:22 CEST 2004
        System: Linux 2.6.18-128.1.1.el5xen

In octave plotting makes a new plot window and a nice plot.   but complains.

octave:2> clear
octave:3> xx =  0:.1:10;
octave:4> yy = xx .^ 3;
octave:5> plot(xx,yy)
         line 0: undefined variable: in

         line 0: undefined variable: in

         line 0: undefined variable: in

         line 0: undefined variable: lw

octave:6> print -dps foo4.ps
warning: isstr is obsolete and will be removed from a future version
of Octave, please use ischar instead
warning: __gnuplot_raw__: this function is obsolete and will be
removed from a future version of Octave
warning: __gnuplot_replot__: this function is obsolete and will be
removed from a future version of Octave
octave:7>

The file is created but there is nothing in it

$ ls -l foo*
-rw-rw-r-- 1 jcw jcw 0 May  4 14:57 foo4.ps

TIA,

Jonathan