I did however once encounter that problem with the unexpected end in a .raq file, and had to stop there cause I wasnt really to sure what was happening, but nevertheless I had to drop that .raq file cause I sure dont know too much about unexpected end errors and thought the file was somehow corrupt during backup.
(could not recover it at all)
I guess syou have to do some research on "unxpected end"
or find soem uncompressor program which can at least get you partial of the stuff.
Post here if you do find one. Ive given up on raq backups alerady. They stink.