0call a nil valuecall a number value这是怎么回事?

luacall_Generic_Call error running function 'CalcPentagramCombatE': '0call a nil valuecall a number value'




function CalcPentagramCombatE(ItemID, Level, DamageMin, DamageMax, PentagramSocketCount)


local PentagramCombatE = 0;


if ( Level > 0 and PentagramSocketCount > 0) then
PentagramCombatE = (Level*(DamageMin+DamageMax)*PentagramSocketCount) / 5
else
PentagramCombatE = (DamageMin+DamageMax) / 5
end

return PentagramCombatE
end