Minecraft broken level dat

Question

While i was playing minecraft (using linux) the power went out and turned the computer off, when i turned it back on i brought minecraft (Feed the beast mod packs) back up and i noticed it all the "news" was restarted, i launched minecraft and my save was gone so i checked the files and i found that instead of the level .dat being a package it was a document.

Does anyone know how to fix the level dat?

What do you mean when you say "package" and "document"? Those words don't have any clear technical meaning, not enough to understand what's wrong with the file. — SevenSidedDie, Aug 28 '13 at 03:42
That's odd, but not much to go on. The normal file isn't actually a "Gzip archive" in the first place. Ok, so that's not a lead, and we'll have to look elsewhere. Hm. — SevenSidedDie, Aug 28 '13 at 03:50
Ive tried putting everything in another save, and it made that save disappear — My ferret is a sneezicus, Aug 28 '13 at 04:02
I am going to get a windows laptop soon, if that helps solve the case — My ferret is a sneezicus, Aug 28 '13 at 04:06
Oh, what OS is this? A Mac? That might explain the package/document thing, since Macs handle types in a way separate from the actual file and it can be corrupted separately. Download a copy of NBT Explorer and see what it thinks of this level.dat? If it can open it at all, it might be reparable. — SevenSidedDie, Aug 28 '13 at 04:16
No its not, and i dont know how to open .exe files on linux.. wine wont open it — My ferret is a sneezicus, Aug 28 '13 at 05:18
That particular exe needs Mono libraries installed before Wine will like it. Check its Linux instructions for exactly which. — SevenSidedDie, Aug 28 '13 at 07:50
Possible duplicate of Where did the world go?. This is what I think the actual problem is, but an unclear close vote could also be justified — pppery, Dec 15 '22 at 17:45

DCA- · Answer 1 · 2013-08-28T08:20:05.463

"fixing" a corrupt file for the purpose of minecraft is near impossible.

If you wish to try and salvage your save and read what is left:

change the extension of the document back to .dat
follow SevenSidedDie's advice and use NBT Explorer to parse the file

if NBT cannot read anything legible, the file may be beyond repair.

if NBT can read it, you can copy information from it to a new save (such as inventory items / settings)

I know this isn't excactly what you want to hear but I hope it helps, Good luck :)

score 1 · Answer 2 · answered Aug 29 '13 at 23:03

1

In the folder for that save there should be a level.dat_old file which is essentially a backup of level.dat. Try removing the _old so that it becomes level.dat and takes over.

If it's just level.dat that was affected then this should fix it.

answered Aug 29 '13 at 23:03

SirBenet

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Minecraft broken level dat

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