playing with all the mods 7
MC version: 1.18.2
Forge: 40.1.86
I create a new world and play for a random amount of time, I explore LostCities cities that were generated on world creation no problem, but at some point, during exploration and generating new chunks the game freezes indefinitely. I play with rare cities
crash-2022-12-11_21.26.36-server.txt

Is this with a custom profile? How did you configure Lost Cities?

it's a custom profile based off of the rarecities profile. I shrink the cities so they are between 32 and 48 blocks radius, decrease both fountains and parks to 0.001, I generally set buildings to 0.7 but I use up to 0.9, and buildings 2X2 I set somewhere from 0.3 to 0.5, floors I boost from between 12 to 30 floors above ground and between 3 to 7 cellars below ground, chance of small and large explosions I add an additional 0, so explosions are 0.0002, and min/exp are 0.003, I don't recall changing anything in the transport section on this map, but I've set distance mask to 63 in other maps (it doesn't seem to change anything), all other settings remain original to their rarecities settings.
converted the config file to .txt, see attached:
lostcities-server.txt

also, forgot to mention, this is all in the overworld.

yes this problem only happens with custom profiles. Your floors are waaay too high. That's what is causing an overflow and that causes this problem

Ah, drat. What should the max floors be to prevent this?
if I try and make 50 floors it automatically corrects to 30, so I though 30 was the max.

Ah, ok, I'll try for 20 floors and hopefully that'll work. Thanks for your help!

It's a bit complicated. The max floors that are possible depends also on the variation of the terrain. I need to add in a better safety check for this because this is a very common problem

I'm going to try to implement a better solution for this

I just released a new version of Lost Cities where this crash should no longer happen and the maximum number of floors and cellars has been raised considerably. If a building goes beyond build limits it will now automatically adjust

hahahaha, these cities are even more glorious! Great update!