crash-2021-12-11_01.09.39-server.txt
Minecraft 1.18
Mod version: 1.2.35
Details: Crashes upon trying to enter the nethering dimension for the first time. Unknown as to how to resolve.

crash-2022-01-04_14.35.16-server.txt
2022-01-04-1.log

Minecraft: 1.18.1
Mod version: 1.2.38

I've been running into the same issue.

Some more information:
I've never been in the nethering dim, so minecraft is trying to build the dim.
I'm running immersive portals, so it's crashing when I try to light the portal.

Did you try without immersive portals to see if that is the problem

the crash seems to happen with Better Nether, perhaps it is generating a structure that is beyond the range on the tethering dimension.

In my test it crashed trying to create a better nether: nether city

crash-2022-01-04_15.22.00-server.txt
2022-01-04-5.log

Disabling immersive portals does not help.

Disabling BetterNether does help.

Shouldn't the nethering dim NOT use any nether mods?
Is it possible to solve this on your side?

The nethering dim is simply a datapack dim that uses the built-in vanilla nether type generator. Mods that tweak/adjust/replace the vanilla nether generator might break the nethering dim (or any dim created by the vanilla generator).

OK, so you can't access the "original vanilla generator" as long as the "BetterNether vanilla generator" is in place.
That's bad, but I understand the problem.

Do you see any chance to create compatibility with BetterNether?

Try deleting the tethering dim and try to re-create.

Try deleting the tethering dim and try to re-create.

I guess you meant the nethering dim? I just created this dim after I disabled BetterNether?!
I can now visit this dim, but I guess when I re-enable BetterNether I might run into troubles when new chunks are generated...

So I guess my best try would be to pregen quite a few chunks before re-enabling BetterNether - as long as you don't tell me there's an easy compatibility fix.

there is not, Better Nether replaces the vanilla nether generator. To get around the problem, I would have to create my own generator for nether types, which I have no desire to do. Better Nether is still in beta and quite buggy, so perhaps future version with work the situation out. In 1.17.1, both mods were able to work together.

OK, and thanks for your quick help.

Please test in 1.2.36 as a starting point for debugging.

Fixed with the latest BCLib version.

Wonderful. Thank you.

This one: bclib-1.2.5-1.18/1.18.1

Tested out, looks good. Thanks again.