Medieval MC [Forge] MMC4 - Errors in selected datapacks after world has been running for some time

[muon-rw]

Describe the Bug

level.dat becomes unopenable after some time in the world due to nesting surface rules in the minecraft:the_end dimension.

"Tried to read NBT tag with too high complexity, depth > 512"

Seems a mod compatibility issue related to BetterEnd, with possibly Eldritch End or Blueprint. More testing is needed to figure out the cause.

For now, to fix:

• Download https://github.com/tryashtar/nbt-studio
• Retrieve your seed for your broken world. This can be found in the level.dat under Data>WorldGenSettings
• Generate a new world using this seed with the same settings
• Open the new world's level.dat, open Data\WorldGenSettings\dimensions\minecraft:the_end
• Copy "generator: [3 entries]"
• Open your old level.dat, select the same "generator: [3 entries]", and click delete.
• Now select the "minecraft:the_end: [2 entries]" block, and paste here to place the generator block inside
• Save the file, you should now be able to open your old world.
• This issue will likely reappear after some time until the bug is resolved.

Reproduction Steps

• Unknown. Happens after some time in the same world.

Crash Report or Log

https://mclo.gs/V3FWN45

Minecraft Version

1.20

Modloader

Forge

Modpack Version

MMC4 v26.5 HF

[muon-rw]

Seems to be caused by Outer End + Better End Just going to remove Outer End for v27