Modpacks refusing to open? Vanila works through launcher?

[ReganHT]

I've tried most things that have been suggested to me and I honestly have no idea what to do next! Please help.

http://pastebin.com/TNPhN943

[kaitoxd]

exactly the same problem, please Help

[titanic11]

I am having the exact same problem, I tried everything.

Here is my latest Crash Report: http://pastebin.com/v9qxSUyC

[tarpa]

Found this, works for me