in this host from shell it runs and generates gif graph image file with data,

but from browser it is generating graph file with empty data.

I have compared perl and its modules wt both hosts, all are same, also checked permission, browser can able to write empty file

but still not able to find where it is get struck when this script from browser.

after fix the permission error, from shell I can run that shell script(system)-------------------- same script when we calling from perl script not working,.....................it through system error 256 on browser

Again please note that the same script working via perl on other system without any issue.

Please help me to identify the issue on this system

Try this cut down version of your program on both working and non-working systems and compare the contents of $ENV{'PATH'}

#!/usr/bin/perl
use strict;
use warnings;
use CGI ':standard';
use CGI::Carp 'fatalsToBrowser';

my $node = param('node');
my $target      = "raksan";
my $wwwpath     = '/target';
my $wwwrealpath = "/home/nagios/stat/$target/htdocs";
my $tmpgraph    = "rrd-$$.gif";
my $recenttimes = time - 3600 * 36;

print header(),start_html();

my $cmd = "/home/nagios/stat/scripts/ng_rrd2img.sh $target $node dig $
+recenttimes now 300 130 > $wwwrealpath/tmp/$tmpgraph";
my $status = system($cmd);
if ($status){
  warn "$?";
}

my $path = join "\n",split ';',$ENV{'PATH'};
print qq!<pre>$cmd</pre>
<pre>PATH
$path</pre>
<img src="$wwwpath/tmp/$tmpgraph" alt="$wwwpath/tmp/$tmpgraph" border=
+"1"/>!;
print end_html();
[download]

poj