World Crashed and Disappeared from In game Menu

[Gummi]

I am playing on the Direwolf20 1.6.4 v1.0.14.
Basically what happened is I was in the nether just killing blazes and my world crashed then when i went to go open it back up again it was not in the menu but still in the saves folder.
Whenever I click the Singleplayer button on the menu a bunch of error messages show up in console heres the paste bin of them: http://pastebin.com/L3tDvg31
Also heres the paste bin to the initial crash report: http://pastebin.com/mhew6FRX

I have no clue how to recreate this... The only thing I think is that a similar crash happened earlier but I was still able to access my world so it was fine in the end just in case it helps heres that crash report: http://pastebin.com/XCc19k75

 

[Chaka]

Can we see your whole minecraft log

 

[Gummi]

What do you mean whole Minecraft log? from the crash or from the world selector errors?

 

[Chaka]

When you start minecraft to when you close it

 

[Gummi]

Okay heres the entire log hope it helps: http://pastebin.com/nxRhWPLq

 

[Chaka]

Try updating java

 

[Gummi]

I was already on the latest version but I reinstalled it anyways and it didn't help.

 

[Chaka]

Hmm, Sorry that I couldn't help I'm not the best in java

 

[Gummi]

no problem I hope I can get it fixed soon though

 

[Chaka]

Here let me get you someone else to help.

 

[Viper-7]

Most likely, your save's level.dat is corrupt. (FTB Install path \ Pack name \ minecraft \ saves \ Save Name)

This file doesn't change much, so if you have a backup copy of your save, just take it from there. If you don't have a backup, you can try the level.dat_old, renaming it to level.dat and trying again.

If all that fails, you can create a new level.dat by creating a new save game, then you can copy that level.dat into your old save, to make it appear in the menu again. This is NOT an ideal solution, as it will change your seed. There will be nasty chunk borders around new terrain you explore .

 

[Gummi]

Thank you very much but which level.dat should i replace? level.dat_old or level.dat_mcr

 

[Chaka]

Don't go by what I say but you probably should delete it and generate a new one.

 

[Viper-7]

Minecraft only looks for level.dat, the others are old/backup copies, so rename one of those to level.dat and try it

 

[Gummi]

okay thats great because i have a back up from my world

 

[Gummi]

it worked! A few minor draw backs happened... like my inventory and map were reset but it wasn't that bad. thank you so much for your help