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MV Yanfly Subclass "Subclass is not function" error.

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 Yanfly Subclass "Subclass is not function" error.
  • Original author: KrimsonKatt
  • Original date: August 21, 2020
  • Source thread: https://forums.rpgmakerweb.com/threads/yanfly-subclass-subclass-is-not-function-error.125549/
  • Source forum path: Game Development Engines > RPG Maker Javascript Plugins > Javascript/Plugin Support

Summary

I'm having an issue with Yanfly's Subclass plugin. A error keeps popping up whenever I open the class menu in-game. Please help. (Note: Quoted from a comment I made on another thread.) KrimsonKatt said: I'm having the same issue too, but since I'm using Olivia's anti player stress plugin it gave me a bit more information. The game works fine without subclass but with subclass the game crashes whenever I go into the class menu, Here is the screenshot.

Archived First Post

I'm having an issue with Yanfly's Subclass plugin. A error keeps popping up whenever I open the class menu in-game. Please help.

(Note: Quoted from a comment I made on another thread.)

KrimsonKatt said:
I'm having the same issue too, but since I'm using Olivia's anti player stress plugin it gave me a bit more information. The game works fine without subclass but with subclass the game crashes whenever I go into the class menu, Here is the screenshot.
View attachment 155998

Edit: Forgot the Plugin List lol
View attachment 155999
View attachment 156001
View attachment 156002
Click to expand...

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

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