Error TFS 1.1

[Felipe Monteiro]

i'd like to know what means this errors below.

Lua Script Error: [Npc interface]
data/npc/scripts/default.luanThink
data/npc/lib/npcsystem/npchandler.lua:556: attempt to index a nil value
stack traceback:
[C]: in function '__index'
data/npc/lib/npcsystem/npchandler.lua:556: in function 'onWalkAway'
data/npc/lib/npcsystem/npchandler.lua:522: in function 'onThink'
data/npc/scripts/default.lua:8: in function <data/npc/scripts/default.lua:8>

Lua Script Error: [Npc interface]
data/npc/scripts/Captain Breezelda.luanThink
data/npc/lib/npcsystem/npchandler.lua:556: attempt to index a nil value
stack traceback:
[C]: in function '__index'
data/npc/lib/npcsystem/npchandler.lua:556: in function 'onWalkAway'
data/npc/lib/npcsystem/npchandler.lua:522: in function 'onThink'
data/npc/scripts/Captain Breezelda.lua:8: in function <data/npc/scripts/Captain Breezelda.lua:8>


My Captain Breezelda is working fine :x
How can i remove this error ?