I'm not talking about backing up or creating archives of worlds. I want to have one world loaded in my server, then run a code they will duplicate it, so the exact world will have two copies loaded (with different players in them, etc). I first tried completely duplicating the world folder and making a copy. Then I called Code:java Bukkit.createWorld(new WorldCreator(<name of new world>)); Bukkit complained about duplicate UIDs, requesting I delete the UID.dat file. So I did that. However, when running the code it was obvious that the world was being regenerated with a different seed. Entering the world confirmed that they were indeed, different. (They also had a lot of non-matching chunks, which makes sense). So my question: how can I programmatically clone worlds, and load both versions? Thanks!