Lua npc erro

[brTT]

[18/07/2014 12:10:09] [Error - Npc interface]
[18/07/2014 12:10:09] data/npc/scripts/heal.lua:onCreatureSay
[18/07/2014 12:10:09] Description:
[18/07/2014 12:10:09] data/npc/scripts/heal.lua:58: bad argument #1 to 'sub' (number expected, got no value)
[18/07/2014 12:10:09] stack traceback:
[18/07/2014 12:10:09]     [C]: in function 'sub'
[18/07/2014 12:10:09]     data/npc/scripts/heal.lua:58: in function <data/npc/scripts/heal.lua:42>

npc
http://www.mediafire.com/view/rs62w898y4j5edj/heal.lua

 

[brTT]

up

 

[Hernest]

Well 'sub' is not defined.
doItemSetAttribute(uid, "poke", getItemAttribute(uid, "poke"):sub(1, find...

it's nil value

 

[brTT]

pick my Script please

 

[brTT]

up

 

[Hernest]

As i said 'sub' is not defined.
Maybe tell me where did u get that script, u can try to define that 'sub', i am not sure what it is to

 

[brTT]

As i said 'sub' is not defined.
Maybe tell me where did u get that script, u can try to define that 'sub', i am not sure what it is to

line
doItemSetAttribute(uid, "poke", getItemAttribute(uid, "poke"):sub(1, findLetter(getItemAttribute(uid, "poke"), "[")) .. maxh .. getItemAttribute(uid, "poke"):sub(findLetter(getItemAttribute(uid, "poke"), "/")))