In some worlds, trying to use /fill commands results with the message "cannot place blocks outside of world." Maybe the game thinks the chunks don't exist? This command is done within build limit, yet still has this error. It makes building in worlds more difficult and tiresome, especially since it randomly affects worlds. Maybe the game thinks the chunks don't exist? This command is done within build limit, yet still has this error. It makes building in worlds more difficult and tiresome, especially since it randomly affects worlds. I'm not sure of any connection between worlds. It happens in both superflat and regularly generated worlds.