We're getting this as a game output whenever we try to launch minecraft 1.7.10. We're running the direwolf 20 mod pack with somethings added and removed.
http://pastebin.com/2THnJUH6
http://pastebin.com/TdYHF018 (FML logs)
We'll click play, the launch will close and try to open minecraft, but then the launcher comes back with this game output. This minecraft mod file has been copied from my computer to my husband's computer (we both have an account, but it's easier to match the mods for the server this way). I have no issues running the same files on my computer.