When I load up world, it works for 15 seconds, then crashes

[jollygoodjaydon]

Hello! Me and my friend were playing an AOTBT LAN world and we built a really cool castle. Everything was going great, until the next day, I got on the singleplayer world, and it crashed after about 15 seconds. It continues to do this for this world, but all my other worlds work totally fine. I have tried uninstalling and reinstalling the pack, however, to no avail. Help!