When i delete not exist tiers, i always got +OK code
version FreeSWITCH Version 1.4.13~64bit ( 64bit)
========= tier freeswitch@192.168.10.201@internal> callcenter_config tier del none none +OK 2014-12-18 13:08:05.977624 [DEBUG] mod_callcenter.c:1202 Deleted tier Agent none in Queue none freeswitch@192.168.10.201@internal> callcenter_config tier del none none +OK 2014-12-18 13:08:53.677653 [DEBUG] mod_callcenter.c:1202 Deleted tier Agent none in Queue none ========agent freeswitch@192.168.10.201@internal> callcenter_config agent del nothing +OK 2014-12-18 13:11:08.177763 [DEBUG] mod_callcenter.c:852 Deleted Agent nothing freeswitch@192.168.10.201@internal> freeswitch@192.168.10.201@internal> callcenter_config agent del nothing +OK 2014-12-18 13:11:08.417641 [DEBUG] mod_callcenter.c:852 Deleted Agent nothing