[Scripting Question] Restore held items after battle

[Poltea]

I'm making a game with more of a focus on competitive-style battles, and I want the player to be able to use items like focus sashes and weakness policies without worrying about permanently losing the item. I found this script: https://www.pokecommunity.com/showthread.php?t=429026 that says it achieves the effect I'm looking for, but upon getting into a battle with the script enabled, the game crashes with the following error:

[Pokémon Essentials version 18.1]
Exception: ArgumentError
Message: wrong number of arguments(0 for 1)

Backtrace:
Battle_StartAndEnd:258:in `pbStartBattleCore'
Battle_StartAndEnd:258:in `pbStartBattle'
PField_Battles:421:in `pbTrainerBattleCore'
PField_Battles:420:in `pbSceneStandby'
PField_Battles:422:in `pbTrainerBattleCore'
PField_Battles:419:in `pbBattleAnimation'
PField_Battles:419:in `pbTrainerBattleCore'
PField_Battles:487:in `pbTrainerBattle'
Debug_Menu:369:in `pbDebugMenuActions'
Debug_Menu:857:in `pbDebugMenu'

Is there a way to get this script to work, or if not, is there an alternate way to restore the player's held items after a battle?

 

[StCooler]

Not tested, but if you look at the function:

  def pbRemoveItem(permanent=true)

comment the line that deletes the item:

  def pbRemoveItem(permanent=true)
    @effects[PBEffects::ChoiceBand] = -1
    @effects[PBEffects::Unburden]   = true if @item>0
    setInitialItem(0) if self.initialItem==@item && permanent # Comment this
    self.item = 0
  end

 

[Poltea]

Thank you! This worked for most things; for other people seeking the same effect, search out other instances of setInitialItem and comment them as well.