changing stat effects for the defualt batle system?

[corpsegirl]

Error on line 90.

Code:

#--------------------------------------------------------------------------
  # * Applying Normal Attack Effects
  #     attacker : battler
  #--------------------------------------------------------------------------
  def attack_effect(attacker)
    # Clear critical flag
    self.critical = false
    # First hit detection
    hit_result = ((rand(100)) < ((50 + (self.agi + self.dex) - (attacker.dex + attacker.int))
    hit = self.cant_evade? ? 100 : hit
    # If hit occurs
    if hit_result == true
      # Calculate basic damage
      min = [attacker.atk + attacker.str + attacker.int]
      max = [attacker.atk + attacker.str + attacker.str]
      atk = (rand(max - min) + min)
      self.damage = atk
      # Element correction
      self.damage *= elements_correct(attacker.element_set)
      self.damage /= 100
      # If damage value is strictly positive
      if self.damage > 0
        # Critical correction
        if rand(100) < (attacker.agi + attacker.int)
          self.damage *= (((attacker.str + attacker.int + attacker.agi)/100)+1)
          self.critical = true
        end
        # Guard correction
        if self.guarding?
          self.damage /= 2
        end
      end
    end
    # If hit occurs
    if hit_result == true
      # State Removed by Shock
      remove_states_shock
      # Substract damage from HP
      self.hp -= self.damage
      # State change
      @state_changed = false
      states_plus(attacker.plus_state_set)
      states_minus(attacker.minus_state_set)
    # When missing
    else
      # Set damage to "Miss"
      self.damage = "Miss"
      # Clear critical flag
      self.critical = false
    end
    # End Method
    return true
  end