I spent a little over an hour this morning sorting our an error in a Nagios
module for monitoring lexmark printers.

This perl module would throw the error:

Undefined subroutine &SNMP::initMib called at ...

It seems I was foolishly confusing the module "SNMP.pm" packaged in perl-Net-SNMP-5.2.0-1.el5.1 with the "SNMP.pm" packaged in net-snmp-perl. As it turns out, 'Net-SNMP' and 'Net-SNMP' are completely unrelated software projects.