gnuplot> plot "-"
                 ^
         line 1: no data point found in specified file

Unexpected returncode from gnuplot: 256 at /usr/lib/perl5/site_perl/5.8/cygwin/Graph/Layout/Aesthetic/Monitor/GnuPlot.pm line 117.

##</code><code>##

#!/usr/bin/perl

use strict;
use Graph;
use Graph::Layout::Aesthetic::Topology;
use Graph::Layout::Aesthetic::Monitor::GnuPlot;

my $g = Graph->new();

$g->add_vertex("V1");
$g->add_vertex("V2");

my $topology = Graph::Layout::Aesthetic::Topology->from_graph($g);

my $monitor = Graph::Layout::Aesthetic::Monitor::GnuPlot->new();
my $aglo = Graph::Layout::Aesthetic->new($topology);

$monitor->plot($aglo);