I simply flew from my base to the wilderness, and my game crashed. I got two separate crashes at the same time (one minute apart from each other).

Crash report 1: “Exception in server tick loop” (java.lang.NullPointerException)
Crash report 2: “Batching chunks” (java.lang.IllegalStateException: Not building!)

The first crash named Applied Energistics 2 (and no other mods) in as the suspected mod to have caused this crash, which is why I’m posting this on the AE2 issue tracker.

Versions

• Minecraft: 1.12.2
• Forge: 14.23.5.2781
• Modpack: Enigmatica 2 (version 1.65a, latest)
• Applied Energistics 2: rv6-stable-6 (latest)

Try to chunkload the me system to workaround temporarily .. (Is that even spelled right?)

My entire ME system is already chunk-loaded.

Duplicate of #3987

The other one is probably the usual "Do not use optifine" case.