The unrar command does not seem to work for some files. If I unrar the files with WinRar on Windows it works without a charge. These files are password encrypted and split into multiple files.
Are you using the free or nonfree unrar? (The free version is in package unrar-free, the nonfree version in package unrar. Check which you have installed with
The unrar-free package won't handle some archives in the RAR 3.0 archive format. You can try using the nonfree unrar package (install with
Alternatively, you can try using 7zip (install the p7zip-full and p7zip-rar packages), or you can grab the latest RAR binaries direct from RARlabs. The official RARlabs version is a 40-day trial; see their site for a pricelist.