Code: 2011-12-23 16:11:15 [SEVERE] net.minecraft.server.WorldConlictException: Failed to check session lock, aborting 2011-12-23 16:11:15 [SEVERE] at net.minecraft.server.WorldNBTStorage.checkSession(WorldNBTStorage.java:74) 2011-12-23 16:11:15 [SEVERE] at net.minecraft.server.World.l(World.java:2641) 2011-12-23 16:11:15 [SEVERE] at net.minecraft.server.World.y(World.java:274) Any idea's what this is? Indirectly bumps the thread... Woops. EDIT by Moderator: merged posts, please use the edit button instead of double posting.