mcaselector VS Amulet-Map-Editor

I'm going to guess there's no backup but it might still be possible to salvage. Based on the error, at least two chunks have malformed data that can't be decompressed. The first thing to try would be to attempt to open the world with MCA Selector. If it can identify and cope with the bad chunks, you can delete them and get back into the world.

Hello all! This is a screenshot of the terminal for MCA selector when I try to install it on my Mac using these instructions: https://github.com/Querz/mcaselector/wiki/Installation

edit : MCA Selector is the solution i found it here after googling a while https://github.com/Querz/mcaselector

Try using a program like MCASelector: https://github.com/Querz/mcaselector/releases

I use MCASelector on my long run survival, it works pretty good

Correct, that's the only thing left from that world. If you can load the region folder in MCASelector you'll get a top-down view of what's there.

If it is caused by your explorers going out 20,000 blocks you could try using a tool like MCASelector to trim the world back down to a manageable size.

Use MCAselector to prune the chunks you want to delete then load the world in 1.20 when it’s released and those chunks will regenerate.

In case you don't know, there's https://github.com/Querz/mcaselector which can do this fairly easily: You can even filter chunks by how long players have been in them.

Edit: AmuletEditor: https://www.amuletmc.com/ Plugin to edit NBT: https://github.com/PREMIEREHELL/Amulet-Plugins/blob/main/EntitiePlugin_nbt_edit.py

There were a few projects that continued working on it. One of them, “MCEdit: Unified”, was supported until 2019, but I don’t believe it supported the MC 1.13 Block ID formats. The team remade it for newer versions and named it Amulet for MC 1.12+.

You can use Amulet to delete chunks that you don't want, and it seems to work with both Java and Bedrock worlds.

Try exporting your map then using Chunker to convert to .mcworld. If your world size is too big for it, try Amulet Editor. instead.

Use a map editor like Amulet to delete unused chunks of the map.

I’m not too experienced with it, but you can try to use amulet to try and edit the nether chunks

https://www.amuletmc.com It's pretty easy to use and it does offer the option to change biomes for selected chunks, as well as trim worlds etc.

If you have that, you can use Amulet to copy the chunks to a new world. Amulet also offers a feature that might be a better option for you. It will let you select chunks to save, then delete all others. This lets them regenerate with the new features included.

MCEdit is not compatible with worlds newer than 1.12.2. Some of the developers moved on to Amulet, though I'm not sure how feature complete it is.