Hey I have the same problem and all I want to do is add an end portal because I my world didn't generate properly and I don't want to go in to creative on this world because it is a fun world and i play it all the time. I play on the Glacier seed. maybe you could take a look because i have no clue get back to me when u get a chance i also tried to extract with horizon and that didn't work and then i tried with 360 Revolution and that didn't work maybe you could help me out like i said. http://rapidshare.co...21005023425.bin
Dude just load it in creative of u have to u can always edit it back to survival to make the achievements stick
