World and tick crashes

Ticking entity / Ticking block entity crash

What the log looks like

ticking (?:entity|block entity|tile entity|player|screen|world)
exception ticking world

How to fix it

  1. The Entity Type / Block Entity line names what broke
  2. The namespace before the colon is the mod id
  3. If the world crashes on load every time, remove that entity with an NBT editor
SeverityStops the game
CategoryWorld and tick crashes

Check your own log

Related errors

World and tick crashesCreate Contraption Crash: Cannot read field "x" because "mf.axis" is nullUpdate the Create mod (and any Create add-ons) to the latest version newer than 6.0.10, which includes the upsWorld and tick crashesIllegalStateException: Invalid pool element found (minecraft:jigsaw)Back up your world folders before proceeding, especially if you are in the middle of a server version upgrade.World and tick crashesMissing registry entries — a mod was removed from an existing worldPut the removed mod back, load the world once, then remove its blocks in gameWorld and tick crashesServer thread has not responded — Watchdog shut the server downThe trace printed by the watchdog shows what the tick was busy doingWorld and tick crashesjava.io.EOFException When Loading NBT or Chunk DataMake a full backup copy of your world folder before attempting any file repairs or deletions.World and tick crashesjava.lang.IllegalStateException: Entity is already tracked!Check the stack trace for `TileEntityMobSpawner` or `MobSpawnerAbstract`; if present, find the custom mob spaw