Jubern

First post here on this forum. Please be patient. My SP world has just suddenly stopped loading properly this morning. All I did last time was explore the world around my home base and add some waypoints. Now, it simply hangs on "Loading world" when I select my save and try to load it. World creation and other saves work just fine. Here is my crash log. Unfortunately, I'm not experienced enough to make heads or tails of it. Could anyone interpret it for me? N.B.: This world was originally created in 1.3.9, then I switched to 1.3.13 . http://pastebin.com/c1aq9LPQ