Windows Uh script error

[Maten]

this is what i have in my ultimate healing rune.lua

local combat = createCombatObject()
setCombatParam(combat, COMBAT_PARAM_EFFECT, CONST_ME_MAGIC_BLUE)
setCombatParam(combat, COMBAT_PARAM_AGGRESSIVE, false)
setCombatParam(combat, COMBAT_PARAM_TARGETCASTERORTOPMOST, true)

 
function onCastSpell(cid, var)
	if doCombat(cid, combat, var) then
		doCreatureAddHealth(variantToNumber(var), math.random(900,1000))
	end
end

So why am i getting this error?

[Error - Spell Interface]
data/spells/scripts/healing/ultimate healing rune.lua:onCastSpell
Description:
(luaDoCreatureAddHealth) Creature not found

(this dose not happend when UH is on hotkey)

 

[Cykotitan]

local combat = createCombatObject()
setCombatParam(combat, COMBAT_PARAM_TYPE, COMBAT_HEALING)
setCombatParam(combat, COMBAT_PARAM_EFFECT, CONST_ME_MAGIC_BLUE)
setCombatParam(combat, COMBAT_PARAM_AGGRESSIVE, false)
setCombatParam(combat, COMBAT_PARAM_TARGETCASTERORTOPMOST, true)
setCombatFormula(combat, COMBAT_FORMULA_DAMAGE, 0, 900, 0, 1000)
 
function onCastSpell(cid, var)
	return doCombat(cid, combat, var)
end

 

[Maten]

thx! but how do I get it to heal mana?

 

[Cykotitan]

use COMBAT_MANADRAIN

 

[Maten]

Thank you