Lead Actor Swapper script error

[Ace_V]

I see something actually more malicious.

According to your error message,  [font=Courier New]undefined method '-' for nil:NilClass[/font, the value being subtracted does not exist.  And the value is $game_system.lead_actor.  This suggests that you have no lead_actor value defined in Game_System.

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Hi, kyonides and DerVVulfman! I checked my Game_System and I indeed don't see lead_actor in it.   Also started a new project and it is the same thing:

Code:

#==============================================================================
# ** Game_System
#------------------------------------------------------------------------------
#  This class handles data surrounding the system. Backround music, etc.
#  is managed here as well. Refer to "$game_system" for the instance of
#  this class.
#==============================================================================

class Game_System
  #--------------------------------------------------------------------------
  # * Public Instance Variables
  #--------------------------------------------------------------------------
  attr_reader   :map_interpreter          # map event interpreter
  attr_reader   :battle_interpreter       # battle event interpreter
  attr_accessor :timer                    # timer
  attr_accessor :timer_working            # timer working flag
  attr_accessor :save_disabled            # save forbidden
  attr_accessor :menu_disabled            # menu forbidden
  attr_accessor :encounter_disabled       # encounter forbidden
  attr_accessor :message_position         # text option: positioning
  attr_accessor :message_frame            # text option: window frame
  attr_accessor :save_count               # save count
  attr_accessor :magic_number             # magic number
  #--------------------------------------------------------------------------
  # * Object Initialization
  #--------------------------------------------------------------------------
  def initialize
    @map_interpreter = Interpreter.new(0, true)
    @battle_interpreter = Interpreter.new(0, false)
    @timer = 0
    @timer_working = false
    @save_disabled = false
    @menu_disabled = false
    @encounter_disabled = false
    @message_position = 2
    @message_frame = 0
    @save_count = 0
    @magic_number = 0
  end
  #--------------------------------------------------------------------------
  # * Play Background Music
  #     bgm : background music to be played
  #--------------------------------------------------------------------------
  def bgm_play(bgm)
    @playing_bgm = bgm
    if bgm != nil and bgm.name != ""
      Audio.bgm_play("Audio/BGM/" + bgm.name, bgm.volume, bgm.pitch)
    else
      Audio.bgm_stop
    end
    Graphics.frame_reset
  end
  #--------------------------------------------------------------------------
  # * Stop Background Music
  #--------------------------------------------------------------------------
  def bgm_stop
    Audio.bgm_stop
  end
  #--------------------------------------------------------------------------
  # * Fade Out Background Music
  #     time : fade-out time (in seconds)
  #--------------------------------------------------------------------------
  def bgm_fade(time)
    @playing_bgm = nil
    Audio.bgm_fade(time * 1000)
  end
  #--------------------------------------------------------------------------
  # * Background Music Memory
  #--------------------------------------------------------------------------
  def bgm_memorize
    @memorized_bgm = @playing_bgm
  end
  #--------------------------------------------------------------------------
  # * Restore Background Music
  #--------------------------------------------------------------------------
  def bgm_restore
    bgm_play(@memorized_bgm)
  end
  #--------------------------------------------------------------------------
  # * Play Background Sound
  #     bgs : background sound to be played
  #--------------------------------------------------------------------------
  def bgs_play(bgs)
    @playing_bgs = bgs
    if bgs != nil and bgs.name != ""
      Audio.bgs_play("Audio/BGS/" + bgs.name, bgs.volume, bgs.pitch)
    else
      Audio.bgs_stop
    end
    Graphics.frame_reset
  end
  #--------------------------------------------------------------------------
  # * Fade Out Background Sound
  #     time : fade-out time (in seconds)
  #--------------------------------------------------------------------------
  def bgs_fade(time)
    @playing_bgs = nil
    Audio.bgs_fade(time * 1000)
  end
  #--------------------------------------------------------------------------
  # * Background Sound Memory
  #--------------------------------------------------------------------------
  def bgs_memorize
    @memorized_bgs = @playing_bgs
  end
  #--------------------------------------------------------------------------
  # * Restore Background Sound
  #--------------------------------------------------------------------------
  def bgs_restore
    bgs_play(@memorized_bgs)
  end
  #--------------------------------------------------------------------------
  # * Play Music Effect
  #     me : music effect to be played
  #--------------------------------------------------------------------------
  def me_play(me)
    if me != nil and me.name != ""
      Audio.me_play("Audio/ME/" + me.name, me.volume, me.pitch)
    else
      Audio.me_stop
    end
    Graphics.frame_reset
  end
  #--------------------------------------------------------------------------
  # * Play Sound Effect
  #     se : sound effect to be played
  #--------------------------------------------------------------------------
  def se_play(se)
    if se != nil and se.name != ""
      Audio.se_play("Audio/SE/" + se.name, se.volume, se.pitch)
    end
  end
  #--------------------------------------------------------------------------
  # * Stop Sound Effect
  #--------------------------------------------------------------------------
  def se_stop
    Audio.se_stop
  end
  #--------------------------------------------------------------------------
  # * Get Playing Background Music
  #--------------------------------------------------------------------------
  def playing_bgm
    return @playing_bgm
  end
  #--------------------------------------------------------------------------
  # * Get Playing Background Sound
  #--------------------------------------------------------------------------
  def playing_bgs
    return @playing_bgs
  end
  #--------------------------------------------------------------------------
  # * Get Windowskin File Name
  #--------------------------------------------------------------------------
  def windowskin_name
    if @windowskin_name == nil
      return $data_system.windowskin_name
    else
      return @windowskin_name
    end
  end
  #--------------------------------------------------------------------------
  # * Set Windowskin File Name
  #     windowskin_name : new windowskin file name
  #--------------------------------------------------------------------------
  def windowskin_name=(windowskin_name)
    @windowskin_name = windowskin_name
  end
  #--------------------------------------------------------------------------
  # * Get Battle Background Music
  #--------------------------------------------------------------------------
  def battle_bgm
    if @battle_bgm == nil
      return $data_system.battle_bgm
    else
      return @battle_bgm
    end
  end
  #--------------------------------------------------------------------------
  # * Set Battle Background Music
  #     battle_bgm : new battle background music
  #--------------------------------------------------------------------------
  def battle_bgm=(battle_bgm)
    @battle_bgm = battle_bgm
  end
  #--------------------------------------------------------------------------
  # * Get Background Music for Battle Ending
  #--------------------------------------------------------------------------
  def battle_end_me
    if @battle_end_me == nil
      return $data_system.battle_end_me
    else
      return @battle_end_me
    end
  end
  #--------------------------------------------------------------------------
  # * Set Background Music for Battle Ending
  #     battle_end_me : new battle ending background music
  #--------------------------------------------------------------------------
  def battle_end_me=(battle_end_me)
    @battle_end_me = battle_end_me
  end
  #--------------------------------------------------------------------------
  # * Frame Update
  #--------------------------------------------------------------------------
  def update
    # reduce timer by 1
    if @timer_working and @timer > 0
      @timer -= 1
    end
  end
end

I also checked what kyonides suggested but as DerVVulfman pointed out, the lead_actor = 0 line is already in the Game System's initialize segment of that custom script:

Code:

class Game_System
  #--------------------------------------------------------------------------
  # * Alias Listing
  #--------------------------------------------------------------------------
  attr_reader :lead_actor
  #--------------------------------------------------------------------------
  # * Refresh
  #--------------------------------------------------------------------------
  alias slipknot_las_init initialize
  #--------------------------------------------------------------------------
  # * Initialize
  #--------------------------------------------------------------------------
  def initialize
    slipknot_las_init
    @lead_actor = 0

So, I moved the unaltered script to the very bottom, just above Main, but still encounter the same error on line 61. Adding the extra lines by kyonides to that custom script's update method section still yields an error