timer event Error

[mocoba]

Hello guys i never see this error before and idk how to fix it please help

[15/02/2011 12:50:59] [Error - Spell Interface] 
[15/02/2011 12:50:59] In a timer event called from: 
[15/02/2011 12:50:59] data/spells/scripts/attack/paladin.lua:onCastSpell
[15/02/2011 12:50:59] Description: 
[15/02/2011 12:50:59] (luaDoCombat) Creature not found

and i found this error with knight spell too
anything spam in my ot
fastattack=500

 

[tosuxo]

it would help if you posted the script too
also, surroound it with LUA not PHP tags