(07/28/2014 01:02:38) [ Warning ] : Memory leak detected at ERS 'mob.c::item_drop_ers', 111 objects not freed.
(07/28/2014 01:02:38) [ Warning ] : Memory manager: Memory leaks found and fixed.
(07/28/2014 01:03:50) [ Warning ] : Not all IP addresses in /conf/map-server.conf configured, autodetecting...
(07/28/2014 01:11:40) [ Error ] : npc_event: event not found [Cleaning Service#Rb4::OnBicho]
(07/28/2014 01:23:24) [ Error ] : script_set_reg: cannot write instance variable ''ins_nyd2', NPC not in a instance!
(07/28/2014 01:23:24) [ Debug ] : Source (NPC): 세계수 이그드라실#2F at 2@nyd (202,324)
(07/28/2014 01:43:51) [ Debug ] : NPCEvent 'Manzano#Rb4::OnManzana' not found! (source: rent_timer)
(07/28/2014 01:44:00) [ Error ] : Server received crash signal! Attempting to save all online characters!
(07/28/2014 01:44:15) [ Warning ] : Not all IP addresses in /conf/map-server.conf configured, autodetecting...
(07/28/2014 01:47:00) [ Error ] : script_set_reg: cannot write instance variable ''ins_nyd2', NPC not in a instance!
(07/28/2014 01:47:00) [ Debug ] : Source (NPC): 세계수 이그드라실#2F at 2@nyd (202,324)
(07/28/2014 01:47:03) [ Warning ] : script_get_val: cannot access instance variable ''ins_nyd2', defaulting to 0
(07/28/2014 01:47:03) [ Warning ] : script_get_val: cannot access instance variable ''ins_nyd2', defaulting to 0
(07/28/2014 01:51:01) [ Error ] : script_set_reg: cannot write instance variable ''ins_nyd2', NPC not in a instance!
(07/28/2014 01:51:01) [ Debug ] : Source (NPC): 세계수 이그드라실#2F at 2@nyd (202,324)
(07/28/2014 02:04:39) [ Error ] : Server received crash signal! Attempting to save all online characters!
(07/28/2014 02:04:54) [ Warning ] : Not all IP addresses in /conf/map-server.conf configured, autodetecting...
(07/28/2014 02:05:31) [ Debug ] : status_change_end: SC_DANCING is missing skill unit group (val1=655681, val2=2346, val3=0, val4=0, timer=105, tid=105, char_id=150780, map=rentinb3, x=17, y=12, prev=<none>:0, from=..srcmapstatus.c:11302). Please report this! (#3504)
(07/28/2014 02:05:31) [ Debug ] : skill_delunitgroup: group is NULL (source=..srcmapstatus.c:9920, )! Please report this! (#3504)
Why do these things happen?
Please help.