Cannot convert world

[oldlu0212]

hello,
i got this if i try to convert my world into .obj

C:\Users\Kevin\Desktop\mcobj>mcobj -cpu 4 -s 20 -o world1.obj %AppData%.minecraft\saves\World1
mcobj 0.14 (cpu: 4) Copyright (c) 2011-2012 Jonathan Wright
nbt.ReadLevelDat reading lists of typeId 0 not supported. length:0

what am i doing wrong?

[quag]

Hi Kevin,

The app hasn't been updated in two years. It looks like it no longer works on the current Minecraft world files.

quag