Launcher restart

[BenzZa2468]

At first,I can play Hexxit mod recommended version normally then I download Hexxit mod 3.0.0c(or any Hexxit above recommended version). When I press play the launcher disappear, a few second later it pops up again.Minecraft window doesn't pops up,no error message either.

[Munaus]

post the log

logs can be found when clicking the Cog-Wheel button on the top right corner on the launcher window.
If you can't open the launcher the logs can also be found inside %appdata% -> Roaming -> .technic -> logs

Paste the content on pastebin.com or paste.ubuntu.com and give the link.

[BenzZa2468]

post the log

logs can be found when clicking the Cog-Wheel button on the top right corner on the launcher window.
If you can't open the launcher the logs can also be found inside %appdata% -> Roaming -> .technic -> logs

Paste the content on pastebin.com or paste.ubuntu.com and give the link.

here's the log , http://pastebin.com/rfLwm6q7

[Munaus]

Unable to launch
 [INFO]  java.util.ConcurrentModificationException

This has been mentioned on Technic news for months. http://www.technicpack.net/article/concurrentmodificationexception-in-java-18020.89

Get LegacyJavaFixer from LexManos (google it!) and put it in your mods folder in the modpack you wish to play