[Error] What's wrong with my "Only trigger additional move effect if the move is SuperEffective on its target" code?

[SuperSpyroDragon64]

Hello, I'd like to remove an element of RNG from the game by making the optional effects of some moves (For example, Psychic and its chance to reduce the foe's Special Defense stat) only trigger when the move is super effective.

    # Additional effect ON SUPER EFFECTIVES ONLY
    if !user.hasActiveAbility?(:SHEERFORCE)
      targets.each do |b|
        next if b.damageState.calcDamage>=0 && Effectiveness.super_effective?(target.damageState.typeMod)
          move.pbAdditionalEffect(user,b)
      end
    end

What am I doing wrong? When I attack a Pokemon Super Effectively, I get an error that says

Exception `NameError' at 155:Battler_UseMove:721 - undefined local variable or method `target' for #<PokeBattle_Battler>

 

[Vendily]

The target variable is not defined in this context. You do have a b variable, which contains an element of the targets array, so you can swap out target for b.