Minecraft Crash-World Disappeared

[Danzic]

Hey, hopefully you guys can help me. I was in my FTB Monster 1.0.9 map and i created a new age in mystcraft and when i tried to enter the age it took an unusually long amount of time to load then crashed. When i opened my minecraft back up and tried to select my world it was not appearing in my list.... however, when i go into the minecraft folder for monster and go to the saves folder the file for the world is there but i cant pick it in the minecraft menu. hopefully i was as clear as possible.. i will upload the crash report. and if you have a solve for it can you please be as descriptive as possible because i am still new to ftb and i dunno much about problem solving involving computer files... haha. thanks!

 

[Tristam Izumi]

Your level.dat from your world got corrupted.

How to recover from a world disappearing from the in-game menu:

1.Make a new world
2.Enter the world and leave
3.Go to your saves folder of that particular pack
4.Copy your level.dat FROM the new world TO the old world and replace it.
5.Delete the new world.
6.Enter the old one and go to Cheat Mode on NEI and give your items back.

 

[Danzic]

hey, thank you for the reply i did everything that you said and now when i select a world it says the name of the world i made just now "New World 190" and underneath it has the name of the old map "New MONSTER" but when i open it its the new map still (New World 190)... where do i go from here?

 

[UniZero]

If you mean the old map data is there and you are using mapwriter then delete the mapwriter folder from within your save.