Id just like to point out that this is some scary code. Duplication like you have in that first section just screams out "refactor me!" You should convert as much of that into a subroutine, and then call it twice with the appropriate values. A perfect example of why you should do this are the following two lines

$s_ftp->binary() or die $s_ftp->message;
$d_ftp->binary() or die $s_ftp->message;
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while you were cutting an pasting you forgot to change the second error condition from $s_ftp to $d_ftp. If I were writing it the code would probably look something like this:

use strict;
use warnings;
use Carp;

sub die_msg {
    my $ftp=shift;
    Carp::confess join "",@_,":\n",$ftp->message;
}

sub do_connect {
    my ($user,$pass,$host,$dir)=@_;

    my $ftp=Net::FTP->new($host)
        or die "Failed to connect to host '$host':$@";
    $ftp->login($user,$pass)
        or die_msg $ftp,"Failed login";
    $ftp->binary()
        or die_msg $ftp,"Failed to switch to binary mode";
    $ftp->cwd($dir)
        or die "Cant cwd '$dir'";

    return $ftp;
}


my $source_ftp=do_connect('user1','mypassword','some-server.com','/hom
+e/test/source');
my $dest_ftp  =do_connect('user2','mypassword','some-server.com','/hom
+e/test/dest');

my $source_file = "test.txt";
my $dest_file ||= $source_file;

$source_ftp->pasv_xfer($source_file, $dest_ftp, $dest_file)
  or warn "Failed xfer:\n" .
      $source_ftp->ok ? $dest_ftp->message : $source_ftp->message;
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(Yes I know this doesnt address your real question. But this is also good advice. :-)

Thanks a lot for the advice "demerphq" . As I mentioned I am still a newbie. I know I could have writen a better code. But I just wanted to keep it simple. Thank you all. I will try your recomendations and post the complete solution. Thanks

If you want to get the filesize on the remote server then use the size method.

my $remote_size = $ftp->size($the_file);
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Hi Vek, Its returning the size 0. Any more suggestions? Thanks

Take a peek at File::Listing's parse_dir function. You should be able to grab the file size by using that. Untested:

use File::Listing qw(parse_dir);

# your ftp code here.
my @dirlist = $ftp->ls("-l");
for (parse_dir(@dirlist)) {
   ($name, $type, $size, $mtime, $mode) = @$_;
   next if $type ne 'f'; # only want plain files
   print "Size of $name is $size\n";
}
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-- vek --

I tried to make it simple but still doesn't work. It returns nothing. Please let me know if you can find anything wrong with this code or modify to get the size of the remote file. Thanks

#!/usr/bin/perl
use strict;
use Net::FTP;

my $user = "someuser";
my $passwd ="password";;
my $host = "someFTPserver.com";
my $file = "somefile.txt";
my $ftp = Net::FTP->new($host) or die "$@";
$ftp->login($user, $passwd) or die $ftp->message;
my $dir = "/home/somedir/mydir/dest";
$ftp->cwd($dir) or die "Can't cwd to $dir\n";
my $remote_size =  $ftp-> size($file);
print ("The source file size is :", $remote_size , "\n");

$ftp->quit;
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stat only works on a file sytem mounted on the machine you are running from. You might be able to do something with:

update: do like vek says and use the size method.