# /usr/local/bin/rtr-graph --cfg traffic.cfg

Can't call method "png" on an undefined value at /usr/local/bin/rtr-graph line 123.

# more rtr-graph

$my_graph->set_legend_font  ("gdMediumBoldFont");
$my_graph->set_legend( 'Traffic Out', 'Traffic In' );
my $gd = $my_graph->plot(\@data)->png;                        
   open (IMG, ">$tmp_dir/graph.$name.$int.png") or die;
    binmode IMG;
     print IMG $gd;
  	 close IMG;
		#####