### Forte.pm
package Forte;
use LWP::UserAgent;

$ENV{HTTPS_VERSION} = '3';
$ENV{HTTPS_CERT_FILE} = "some.crt";
$ENV{HTTPS_KEY_FILE} = "some.key";

sub callforte
{
        ...
        my $ua = new LWP::UserAgent;
        my $req = new HTTP::Request("POST", "$url");
        ...
        my $res = $ua->request($req);
        ...
}

#------------------------------------------
        ### LDAP.pm
package LDAP;
use Net::LDAPS;

sub LDAP_connect
{
        ....
        my $conn = new Net::LDAPS($LDAPhost,
                                  port=>$LDAPport,
                                  clientcert=>$cert,
                                  clientkey=>$key);
        ....
}

sub get_student_number
{
        LDAP_connect();
        ...
        my $entry = $conn->search(filter=>"(uid=$username)",
                                 base=>$base,
                                 attrs=>[qw/studentnumber/]);
        if($entry->code())
        {
                html_error("Search for student ID for [$username] fail
+ed:".
                        $entry->code() . "\n");
                return 0;
        }

        ...
        return $entry->{attrs}{studentnumber}[0];
}

#------------------------------------------
        #### application
use Forte;
use LDAP;

        # test for connection to db:
$return = Forte::callforte($url, $input);

...

if($using_portal)
{
        # get student number
        $student_number = LDAP::get_student_number($username);
}
[download]

If I leave use LDAP; in my application but instead comment out use Net::LDAPS; in my LDAP package it works fine again, although obviously I won't be able to connect to LDAP.

Where do I even start with trying to work out what is making these two modules not play well together?

The dependencies (that I know about) and the versions I have installed are as follows:

• libwww-perl
  • Crypt::SSLeay (version 0.41)
• perl-ldap
  • Convert::ASN1 (version 0.15)
  • IO::Socket::SSL (version 0.81)
  • Ne::SSLeay (version 1.18)
  • URI (version 1.19)
  • URI::ldap
  • Digest::MD5 (version 2.20)
  • XML::Parser (version 2.31)
  • MIME::Base64 (version 2.12)
  • Authen::SASL (version 2.02)