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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.
#!/usr/bin/perl ... my $aglo = Graph::Layout::Aesthetic->new($topology); $monitor->plot($aglo);