Lua NPC runes seller dont sells

[yolfran]

Hello otlanders:

I have a problem with my runes seller,I'm using the NPC that is in the crying damson 0.3.6 ,it works fine,until you wants to buy a rod or a wand ,dont sell it,dont remove the money,nothing,and in the console appear this error

[11/05/2010 23:46:47] [Error - Npc interface] 
[11/05/2010 23:46:47] (Unknown script file)
[11/05/2010 23:46:47] Description: 
[11/05/2010 23:46:47] data/npc/lib/npcsystem/modules.lua:1156: bad argument #2 to 'error' (number expected, got string)
[11/05/2010 23:46:47] stack traceback:
[11/05/2010 23:46:47] 	[C]: in function 'error'
[11/05/2010 23:46:47] 	data/npc/lib/npcsystem/modules.lua:1156: in function 'callbackOnBuy'
[11/05/2010 23:46:47] 	data/npc/lib/npcsystem/npchandler.lua:263: in function 'processModuleCallback'
[11/05/2010 23:46:47] 	data/npc/lib/npcsystem/npchandler.lua:440: in function 'onBuy'
[11/05/2010 23:46:47] 	data/npc/lib/npcsystem/modules.lua:1292: in function <data/npc/lib/npcsystem/modules.lua:1291>

what can I do to solve this??I never modified that libs :S

 

[Fallen]

[11/05/2010 23:46:47] data/npc/lib/npcsystem/modules.lua:1156: bad argument #2 to 'error' (number expected, got string)
[11/05/2010 23:46:47] stack traceback:
[11/05/2010 23:46:47] [C]: in function 'error'
when u use the function "error"
u need to put a string then number
like this;
this example will give a Description and a stacktrace back
error("bad argument to #1 table expected got " .. type(something), 2)