Extracting files error

Hi! When extracting the files from the downloaded torrent ( "EBII_2-2b_NoInstaller.7z" ) with an app called "The Unarchiver" ( it's in the AppStore ) I get the following error:

Could not extract the file "mods/ebii/data/sounds/sfx/enviroment/ambience/ambient_town_dog_night_07.wav" from the archive
"EBII_2-2b_NoInstaller.7z" : The archive file is corrupted

That error goes with all the .wav files.... What errors would this cause? How do I fix it?

This is an error caused by 7zips archives not being up to date (or outdated), I suggest installing the latest version of 7zip. In the future I may suggest that we use a zip format instead to help avoid this problem.