Blood Magic

Blood Magic

Mods
90M Downloads

1.18.2 "Datapack" deletion issue.

SSilice opened this issue ยท 1 comments

commented

Issue Description:

When deleting the bloodmagic mod from a server or client side modpack ((i am modpack creator) even having bloodmagic by itself) causes the server world or client world file to refuse to boot giving a "datapack" missing error. (modpack being Magic and Mechanism) Using an app like NBTeditor it seems bloodmagic inserts itself pretty much everywhere. ( it also does not give any form of crash or bug report)

What happens:

"Datapack" issues causing worlds or servers to not load when the mod or config is deleted.

What you expected to happen:

The worlds/server to load perfectly fine.

Steps to reproduce:

  1. Add bloodmagic.
  2. Run for longer than 5 minutes.
  3. Delete the mod from the modpack or folder
  4. World or server no longer runs and gives a "datapack" issue.
    ...

Affected Versions (Do not use "latest"):

  • BloodMagic: 1.18.2
  • Minecraft: 1.18.2
  • Forge: 40.1.85
commented

MinecraftForge/MinecraftForge#8800

Blood Magic adds a Custom "Demon Realm" Dimension, and thus is susceptible to that vanilla problem (looks like Forge has fixed it in 1.19+).

It is possible to edit the save's level.dat file using NBTExplorer to remove such dimensions manually, but that obviously won't work as a modpack update. You might be able to include a Data Pack (loaded by KubeJS, CraftTweaker, or Open Loader) that adds an unreachable dimension at the same Resource Location just to stop vanilla from freaking out about it being missing. I haven't tried it, so I have no idea if it would work or not.

The far simpler approach is to just not add and later remove mods with custom dimensions from a save.