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MV "Cannot read property 'actorId'" error when Removing character in Battle

BMM Archive · July 15, 2026

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Preserved forum archive. This topic stores the original first post and locally mirrored RPG Maker Web attachments when available. It is posted by the BMMPlay archive account, not by the original creator.

Original Source

  • Original title: MV "Cannot read property 'actorId'" error when Removing character in Battle
  • Original author: Kou123
  • Original date: January 10, 2022
  • Source thread: https://forums.rpgmakerweb.com/threads/cannot-read-property-actorid-error-when-removing-character-in-battle.143803/
  • Source forum path: Game Development Engines > RPG Maker Javascript Plugins > Javascript/Plugin Support

Summary

I'm getting this error "Cannot read property 'actorId' of undefined when removing a character during battle. It is a summoned character so when it dies, it automatically remove itself from the party. But whenever that happens, I get this error. Fortunately, I know the cause and it is the script below. It is a script from here https://forums.rpgmakerweb.com/index.php?threads/yr-plugins.69148/ "BattlerChange" is the script name by YoraeRasante. I'll attach the files. If anyone can help fix the script, it would be very helpful. Thanks in advance. var DB_GP_removeActor = Game_Party.prototype.removeActor; Game_Party.prototype.removeActor =...

Archived First Post

I'm getting this error "Cannot read property 'actorId' of undefined when removing a character during battle. It is a summoned character so when it dies, it automatically remove itself from the party. But whenever that happens, I get this error. Fortunately, I know the cause and it is the script below.
It is a script from here https://forums.rpgmakerweb.com/index.php?threads/yr-plugins.69148/ "BattlerChange" is the script name by YoraeRasante. I'll attach the files. If anyone can help fix the script, it would be very helpful. Thanks in advance.


var DB_GP_removeActor = Game_Party.prototype.removeActor;
Game_Party.prototype.removeActor = function(actorId) {
if (this.inBattle()) var i = this.battleMembers().indexOf($gameActors._data[actorId]);
DB_GP_removeActor.call(this, actorId);
if (this.inBattle()) {
SceneManager._scene.actorsToRefresh = SceneManager._scene.actorsToRefresh || [];
for (; i < this.battleMembers().length; i++) {
SceneManager._scene.actorsToRefresh.push(this.battleMembers().actorId());
}
}

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#039#rpg-maker-archive#js-support

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