Lua Npc Error

[mocoba]

I have This Error Plx Fix to me i hate errors and it make crash sometimes

[08/02/2011 08:04:07] [Error - Npc interface] 
[08/02/2011 08:04:07] (Unknown script file)
[08/02/2011 08:04:07] Description: 
[08/02/2011 08:04:07] data/npc/lib/npcsystem/modules.lua:1151: bad argument #2 to 'error' (number expected, got string)
[08/02/2011 08:04:07] stack traceback:
[08/02/2011 08:04:07] 	[C]: in function 'error'
[08/02/2011 08:04:07] 	data/npc/lib/npcsystem/modules.lua:1151: in function 'callbackOnBuy'
[08/02/2011 08:04:07] 	data/npc/lib/npcsystem/npchandler.lua:263: in function 'processModuleCallback'
[08/02/2011 08:04:07] 	data/npc/lib/npcsystem/npchandler.lua:440: in function 'onBuy'
[08/02/2011 08:04:07] 	data/npc/lib/npcsystem/modules.lua:1292: in function <data/npc/lib/npcsystem/modules.lua:1291>

 

[Cykotitan]

It can't cause a crash, and fix your lua npc scripts.