encrypted a folder (7z) partially copied it to my HD. need help opening it

Greetings all. compressed a few files together and saved it to my HD and formatted. When I was ready to access it, I noticed it was called whatever.7z.tmp. I am guessing that it never finished, or maybe it ran out of space on the HD (the file is 5gb) so I wonder if it is possible to still get in and get any of the files that may have made it through. I know its a long shot but I would be very appreciative if it was possible.

Ubuntu 13.10.

still trying to get this fixed if anyone knows how...