Issues with script

If i run “./check_snmp_int.pl -H 10.1.1.1 -C banana -n outside” I get back: Adaptive Security Appliance ‘outside’ interface:UP:1 UP: OK

If i run “./check_snmp_int.pl -H 10.1.254.1 -C public -n outside -k” i get error:
“Use of uninitialized value $o_warn_opt in split at ./check_snmp_int.pl line 330.
2 warning levels for bandwidth checks
”

Any ideas? running debian6 with Perl 5.10.1