YapiFix

YapiFix — Universal Worldgen Crash Fix (Forge 1.20.1)

YapiFix is a lightweight compatibility patch mod for Minecraft 1.20.1 modpacks.

It is designed to prevent Feature order cycle found / FeatureSorter worldgen crashes caused by inconsistent placed-feature ordering between biome and worldgen mods.

What changed in 2.0.0
Earlier versions of YapiFix fixed a small number of known mod conflicts manually.

Starting with YapiFix 2.0.0, the mod uses a broader universal stabilization approach: it normalizes feature ordering after biome modifiers have finished running, helping prevent feature order cycles even when the exact conflicting mod pair is unknown.

What YapiFix does

• Helps prevent FeatureSorter / feature order cycle crashes

• Applies a deterministic feature order during world generation

• Runs as a final compatibility pass after other biome modifiers

• Keeps existing targeted fixes for known problematic cases

• Works as an “install it and forget it” worldgen compatibility patch

What YapiFix does not do

• Does not remove biome features

• Does not remove biomes

• Does not disable worldgen mods

• Does not fix unrelated crashes caused by broken datapack JSON, missing registry entries, invalid configured features, or other mods’ mixins

Useful for modpacks with

• Atmospheric

• Biome Fest

• Aromatic

• Blueprint-based biome mods

• Large modpacks with many biome/worldgen mods

Works with

• Existing worlds

• New worlds

• Datapacks

• Large modpacks

Target Minecraft Version

• Forge 1.20.1

Notes
YapiFix was created to fix real-world worldgen crashes in production modpacks.

Version 2.0.0 changes the philosophy of the mod: instead of only patching individual known conflicts, YapiFix now aims to prevent this entire class of feature-order crashes automatically.

Usage & Permissions

All rights reserved.

You may freely use this mod in private modpacks and personal projects.

If used in public modpacks or servers, a mention or message is appreciated, but not required.

Distribution

Reuploads to other platforms are not permitted without explicit permission.

Linking to the Modrinth page is always welcome.

Updates & Support

YapiFix is updated on request.

If you encounter a FeatureSorter cycle or similar worldgen crash that is not fixed by this mod, you may report it and I will review it when possible.

Credits

Special thanks to Saorise for the updated logo.

Community

Follow the development of the mod, share ideas, and stay updated here:

YouTube: https://www.youtube.com/@YAPILabs

Discord: https://discord.gg/KYGyy9jFCz