请教存档问题存档出错了 - Project1

#==============================================================================
# ■ Scene_File
#==============================================================================
class Scene_File < Scene_Base
#--------------------------------------------------------------------------
# ● 写入存档数据
# file : 写入文件用对象 (已经打开)
#--------------------------------------------------------------------------
def write_save_data(file)
characters = []
for actor in $game_party.members
characters.push([actor.character_name, actor.character_index])
end
$game_system.save_count += 1
$game_system.version_id = $data_system.version_id
@last_bgm = RPG::BGM::last
@last_bgs = RPG::BGS::last
Marshal.dump(characters, file)
Marshal.dump(Graphics.frame_count, file)
Marshal.dump(@last_bgm, file)
Marshal.dump(@last_bgs, file)
Marshal.dump($game_system, file)
Marshal.dump($game_message, file)
Marshal.dump($game_switches, file)
Marshal.dump($game_variables, file)
Marshal.dump($game_self_switches, file)
Marshal.dump($game_actors, file)
Marshal.dump($game_party, file)
Marshal.dump($game_troop, file)
Marshal.dump($game_map, file)
Marshal.dump($game_player, file)
Marshal.dump($data_weapons, file)
Marshal.dump($data_armors, file)
end
#--------------------------------------------------------------------------
# ● 读取存档数据
# file : 读取文件用对象 (已经打开)
#--------------------------------------------------------------------------
def read_save_data(file)
characters = Marshal.load(file)
Graphics.frame_count = Marshal.load(file)
@last_bgm = Marshal.load(file)
@last_bgs = Marshal.load(file)
$game_system = Marshal.load(file)
$game_message = Marshal.load(file)
$game_switches = Marshal.load(file)
$game_variables = Marshal.load(file)
$game_self_switches = Marshal.load(file)
$game_actors = Marshal.load(file)
$game_party = Marshal.load(file)
$game_troop = Marshal.load(file)
$game_map = Marshal.load(file)
$game_player = Marshal.load(file)
$data_weapons = Marshal.load(file)
$data_armors = Marshal.load(file)
if $game_system.version_id != $data_system.version_id
$game_map.setup($game_map.map_id)
$game_player.center($game_player.x, $game_player.y)
end
end
end

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