breaks your map

[ElfKing94]

broke my map using this and saving, it was literally fine before i saved one more time for good measure.

[ElfKing94]

needs an undo button or a way to fix corrupt files. now that entire chunk is broken

[ElfKing94]

Description: Loading NBT data
java.io.EOFException: Unexpected end of ZLIB input stream

[Heriptik]

Hi, try delete level.dat and rename level.dat_old to level.dat

In you world folder

[DereC4]

broke my map using this and saving, it was literally fine before i saved one more time for good measure.

While once graciously was maintained, this tool is now nearly a decade outdated. There are plenty of forks and modern nbt editors. NBT Studio works really well for me if u wanna give it a try https://github.com/tryashtar/nbt-studio