FAQ

• Can I download a windows exe so I don't have to install python or other strange things? No. The windows executable is no longer maintaind. If you downloaded one of the .exe that can be found diving deep enough in the releases page you will find yourself with a very old version of region fixer that won't work. So don't do it.

• What does Minecraft Region-Fixer do? It scans Minecraft worlds (Anvil format) searching for errors and reports them. It can also help to fix some of those errors.

• Does it fix worlds unredable by vanilla Minecraft because a mod inserted strange blocks, entities, etc? No. In general Region-Fixer is mostly dedicated to check the integrity of region files, making it independent of of the Minecraft version. So, in general it will work with moded worlds (unless the mod changes the world format or the region format), but it won't remove strange moded things from the world.

• Then what can it fix? It can detect these problems in region files: header problems, chunk header problems, chunk data corrupted problems (typically wrong CRC in compression), wrong located chunks and it can check if a chunk has an unusual amount of entities (zombies, spiders, primed TNT, etc...), this happens sometimes and makes the server to take 100% CPU and hang.

• Can it fix these problems? Well, yes, more or less... If the data of a chunk is corrupted then this chunk is lost. Region-Fixer can use a backup of the map to replace it or just delete it. Although deleting it sounds drastic, you won't notice. Minecraft will regenerate that chunk when needed and the map will look seamless (well, if there was anything built in there then you will notice...). Wrong located and sharing offset chunks can be fixed in the same way, replacing it using back-up or by deleting them. And with entities, Region-Fixer can remove all the entities in a chunk that has too many of them.

• When using backups to replace chunks/regions in region fixer, what is a backup directory? It's just another world directory. A copy of your world from the past.

• My world has a few hundred of chunks broken in different ways. Is that serious? Will be able to play my world ever again? Will I survive to this catastrophic event?

  Hey! it's not the end of the world! Depending of how big your world is and where are those chunks, it could happend that you don't even notice those problems.

  Minecraft only loads a chunk when you are playing near to it. A Minecraft world can be huge, so you can be playing far from broken chunks and nothing bad will happen. It's like a book with thousands of pages. If one page is broken or unreadable it's going to be a pitty but you (probably) are going to miss very little of the story and won't notice unless you are trying to read that exact page. Same thing happens with Minecraft world.

  Unless, of course, the chunk is in the middle of your base, then (probably) it is going to make your world unplayable.