Hello everyone !!!!

I have written a simple following script:

#!/usr/bin/perl -w
use CGI qw(:standard);
use CGI::Carp qw(warningsToBrowser fatalsToBrowser);
print header;
print start_html("Thank You");
my $test_input = 2;


my $cmd=`perl -n /tmp/test.pl $test_input > /pptai/nightly_db/api.out`
+;
                my $resdir = "/pptai/nightly_db/api.out";
                open RES, $resdir or die "Couldn't open file $resdir: 
+$!\n";

print end_html;
[download]

And the corresponding perl is as follows

#!/usr/bin/perl -w
use strict;

if($ARGV)
{
 my $input=$ARGV;
  print "This is number ".$input; 
 }
[download]

I am getting an error like this

Software error:

Couldn't open file /pptai/nightly_db/api.out: No such file or directory

Kindly let me know where I am doing mistake....

Thanks in advance .....