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MZ TypeError: Cannot read property 'isBattler' of null

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: MZ TypeError: Cannot read property 'isBattler' of null
  • Original author: JTnum4
  • Original date: April 6, 2023
  • Source thread: https://forums.rpgmakerweb.com/threads/typeerror-cannot-read-property-isbattler-of-null.156475/
  • Source forum path: Game Development Engines > RPG Maker Javascript Plugins > Javascript/Plugin Support

Summary

Hi! I am using the ARPG Plugin by unagi ootoro and the MPPCharacterMake by JupiterPenguin, and for some reason it gives me the listed above error. I know the problem is with the ARPG Core, but I don't know how to fix it as I'm not a programmer or anything. Know anything I can fix it with?View attachment 258115

Archived First Post

Hi! I am using the ARPG Plugin by unagi ootoro and the MPPCharacterMake by JupiterPenguin, and for some reason it gives me the listed above error. I know the problem is with the ARPG Core, but I don't know how to fix it as I'm not a programmer or anything. Know anything I can fix it with?View attachment 258115

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

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