MRTG as it is distributed contains several perl modules created by other people. The Plain Perl SNMP Code from Simon Leinen SNMP_Session.pm BER.pm --> http://www.switch.ch/misc/leinen/snmp/perl/ The SNMP Utilities module from Mike Mitchell SNMP_util.pm --> this is distributed together with SNMP_Session.pm The PodParser Module from Brad Appleton Pod/*.pm --> CPAN/modules/by-module/Pod/BRADAPP/ (Included with perl 5.6) Thanks very much tobi