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MZ Script call "Bad Arguments" when using Cyclone Steam [Solved]

BMM Archive · July 15, 2026

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 Script call "Bad Arguments" when using Cyclone Steam [Solved]
  • Original author: Vati
  • Original date: December 14, 2022
  • Source thread: https://forums.rpgmakerweb.com/threads/script-call-bad-arguments-when-using-cyclone-steam-solved.153307/
  • Source forum path: Game Development Engines > RPG Maker Javascript Plugins > Javascript/Plugin Support

Summary

I realised it would probably be better to ask my question here, instead of posting in a very old thread, so.... I have been trying integrating Steam achievements in a MZ game with Cyclone Engine, and it seemingly works - I'm not getting any big error messages, and steam shows me as playing the game when I launch it. But overlay isn't working, and when I try to activate an achievement, I get this script call error. I haven't seen anyone else mention this in any of the threads, so...

Archived First Post

I realised it would probably be better to ask my question here, instead of posting in a very old thread, so....

I have been trying integrating Steam achievements in a MZ game with Cyclone Engine, and it seemingly works - I'm not getting any big error messages, and steam shows me as playing the game when I launch it. But overlay isn't working, and when I try to activate an achievement, I get this script call error. I haven't seen anyone else mention this in any of the threads, so I'm a bit desperate to find out what I might have done wrong!
1.png


My script call looks like this (The achievement name should be correct and matching the one in steamworks):
2.png


I'm not sure what "Bad arguments" mean, if it's a typo somewhere, or something else entirely?

The cyclone engine plugin script is here, for reference:
https://github.com/Hudell/cyclone-engine
https://raw.githubusercontent.com/Hudell/cyclone-engine/master/plugins/Cyclone-Steam.js <- the plugin code itself

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