i received below error when i run my code

The script generate result if the input file contains less then 10 users, however the error trigger if the input file contain more than 10 users

i appreciate if anybody can advice, how to rectify the error

Can't call method "dn" on an undefined value at ExportAttribute2.pl line 45, <TEST> line 991.

i have marked the error , line number with the comment # in the below code for your reference

$TEST = 'C:\Perl\project\export\20130402\test.txt';
#$TEST = 'C:\Perl\project\export\20130402\users.txt';
$outputfile = 'C:\Perl\project\export\20130402\result.csv';

open (FH, ">$outputfile") or die "$!";
print FH "uid,SN,GIVENNAME,uniSALUTATION,Displayname\n";

my $adHost = "ldap.uni.com";
my $adUsr = "uid=myscript,ou=users,o=uni.com";
my $adPass = "Myscript2012";
my $query = "(objectclass=uniperson)";
my @attrs = qw(uid SN GIVENNAME uniSALUTATION Displayname);
my $ldap = Net::LDAP->new($adHost) or die $!;
my $mesg = $ldap->bind($adUsr, password =>$adPass);
my $page = Net::LDAP::Control::Paged->new( size => 1000 ) or die $!;

open(TEST) or die("Could not open log file.");
foreach $line (<TEST>) {
chomp($line);
#print "$line \n";#}
#while (1) {            
my @args = ( base => 'ou=users,o=uni.com' , scope => 'sub', filter => 
+$line, attrs => \@attrs, control => [ $page ],);
$mesg = $ldap->search ( @args ) or die $!;
#while (my $entry = $mesg->shift_entry() ) {
#uid,SN,GIVENNAME,uniSALUTATION,Displayname
my $entry = $mesg->shift_entry();
my $entrydn = $entry->dn();   #line 45 the error triggered here
my $uid = $entry->get_value ('uid');
my $SN = $entry->get_value ('SN');
my $GIVENNAME = $entry->get_value ('GIVENNAME');
my $uniSALUTATION = $entry->get_value ('uniSALUTATION');
my $Displayname = $entry->get_value ('Displayname');

print FH "$uid,$SN,$GIVENNAME,$uniSALUTATION,$Displayname\n";
}

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please advice me how to get rid of the error above. I need to export 3000 users based on userID from input file with the selected attributes from LDAP using this script"

In reply to Perl LDAP script error "Can't call method "dn" on an undefined value" by anakin30

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