Similarly to what Ian Batchelder and the OP posted, I am having the same crash when I try to convert my Xbox One game (select game for conversion process, syncs data, conversion process starts, usually gets no further than 0-1%, sometimes I see a sliver of a green progress bar and then the game crashes with no error messages). My world was created in much the same way as his. Started on Xbox 360, ported over to Xbox One, upgraded in size from a single map to the largest size. Have built in the Nether and The End, beaten the Wither and the End Dragon multiple times, have tons of structures and redstone in all portions of the world/Nether/End. Have reset the Nether and The End several times, have never been in Creative, and have loaded about 20 of the 25 maps in the Overworld, explored about half of the Nether, and been all over The End. My save game size is around 208mb and my console has around 784GB of free space.
Brian Wagner
Similarly to what Ian Batchelder and the OP posted, I am having the same crash when I try to convert my Xbox One game (select game for conversion process, syncs data, conversion process starts, usually gets no further than 0-1%, sometimes I see a sliver of a green progress bar and then the game crashes with no error messages). My world was created in much the same way as his. Started on Xbox 360, ported over to Xbox One, upgraded in size from a single map to the largest size. Have built in the Nether and The End, beaten the Wither and the End Dragon multiple times, have tons of structures and redstone in all portions of the world/Nether/End. Have reset the Nether and The End several times, have never been in Creative, and have loaded about 20 of the 25 maps in the Overworld, explored about half of the Nether, and been all over The End. My save game size is around 208mb and my console has around 784GB of free space.