Crash with ContinuousOBBCollider in Create

[Creeperz653]

Context

Description:
Server crashes during the tick loop with a NullPointerException when Create tries to read mf.axis.x in ContinuousOBBCollider.collideMany(). This happens while processing contraption collisions.

Exception:

java.lang.NullPointerException: Cannot read field "x" because "mf.axis" is null
  at com.simibubi.create.foundation.collision.ContinuousOBBCollider.collideMany(ContinuousOBBCollider.java:153)
  at com.simibubi.create.content.contraptions.ContraptionCollider.collideEntities(ContraptionCollider.java:166)
  at com.simibubi.create.content.contraptions.ContraptionHandler.tick(ContraptionHandler.java:54)

Versions:

• Minecraft: 1.21.1
• NeoForge: 21.1.228
• Create: 6.0.10
• Sable: (neoforge build)

Other mods injecting into ContraptionCollider:

• Create Big Cannons
• Bits 'n Bobs
• Aeronautics
• Sable (sable-neoforge.mixins.json:compatibility.create.contraptions.ContraptionColliderMixin)

Steps to Reproduce:
Crash occurs on server tick — appears to be triggered by a moving Create contraption with an uninitialized OBB axis.

Notes:
Multiple mods are mixing into ContraptionCollider. Sable's mixin is listed in the stack trace and may be interfering with Create's collision axis initialization. Full crash report attached.

Crash Report UUID: 82ebdd09-9e68-4ac2-a983-e78993671a69

Crash Report

https://mclo.gs/NA8EWeU

[thedeerirty]

Hi, I think I'm having a similar error occur to me on my server; is there a way I can resolve this?

[Creeperz653]

how the hell would i know lmao anyawy ask project leader if this is fixed

[spacekotek]

Same crash here
crash log: https://mclo.gs/g0LDupo

[freddy043]

Me and multiple of my Friends got the same Problem, exact same Log.

The real Problem however, the World is now just Garbage. Even AFTER Taking out Sable&Aeronautics, the Problem persists and World is unloadable. Please fix.

No difference in Singleplayer or Multiplayer.
The Multiplayerserver even Crashed on its Own, without anyone being on it and no Chunks with Sable/Aeronatics stuff (Force)loaded.

Kind of sounds like a very cheap Variable-Error to me...

[spacekotek]

Seems like related issues
Creators-of-Aeronautics/Simulated-Project#752
Creators-of-Create/Create#10218

[discordantdiscord46-ux]

this is happening to me too if MF is null error comes then your world is Corrupt! (i think) and u cant join it again unless u make another world and i get this error when using the hand crank from create along with the create big cannons (loading it part) this sucks alot.....

[thedeerirty]

you don't have to make a new world

download an nbteditor program, and find the entities file with the matching chunk coordinates in your world's save folder. find the contraption entity, delete it and save.

[freddy043]

well i surely figured that but that cant be the solution... dont wanna loose my stuff and even though i have backups and schematics, its annoying because it will likely happen again
i mean - even after the last update there are new ppl in here describing the same problem

[discordantdiscord46-ux]

I just want this fixed is all........

[WeissRu]

If your save file has become corrupted, you may attempt to downgrade Create to version 6.0.9

This issue is caused by Create version 6.0.10. Here is a crash log (https://mclo.gs/Tmz0QKP) containing only Create proof this. Therefore, you should either wait for the Create developers to fix this issue or downgrade Create to version 6.0.9. Unfortunately, if you are also playing with the Aeronautics, it will need to be downgraded as well.
Relevant Issue (also the first instance I found with clear enough reproduction steps): Creators-of-Create/Create#10218

Reproduction Steps: Place a Mechanical Drill facing downwards, then place a Rope Pulley directly above it. Apply rotational force to the Rope Pulley in the correct direction (to extend the rope) at a speed of 32 RPM. The drill will begin mining blocks downwards, then game will crash. (In most cases, the crash occurs after mining just two blocks; if it does not happen, try rebuilding the contraption at a different location.)