What's the meaning of "incorrect entry magic“？

[Sylive147]

I got empty files after inputing “.\thdat.exe -x d th08.dat”，why? And I also “enemy.anm: couldn't open enemy.anm for reading” after “ .\thanm.exe -x enemy.anm”（Happens all versions）

[32th-System]

It's trying to extract a file "th08.dat" from a nonexistent file "d" in your first command. The right command is .\thdat.exe -x8 th08.dat. If you only want to extract enemy.anm for example it would be thdat -x8 th08.dat enemy.anm. The thanm command is correct though.