Pixelmon modpack keeps crashing ingame

[rmusky]

Launcher Version: Launcher build 383

Operating System: Dell XPS, Windows 7

Java Version: Version 7, update 45

Antivirus Program: Avast free

Description of Problem:

Very frequently when I am playing, the client will just crash.

Error Messages:

None, it just closes

Error Log:

2014/01/17 19:19:04 [iNFO]  2014-01-17 19:19:04 [iNFO] [sTDOUT] 

2014/01/17 19:23:38 [iNFO] ------------------------------------------

2014/01/17 19:23:38 [iNFO] Technic Launcher is starting....

2014/01/17 19:23:38 [iNFO] Launcher Build: 383

2014/01/17 19:23:38 [iNFO] ------------ Startup Parameters ------------

2014/01/17 19:23:38 [iNFO] --------- End of Startup Parameters ---------

2014/01/17 19:23:38 [iNFO] Analytics Response [runLauncher]: 200

2014/01/17 19:23:39 [iNFO] Starting download of https://minotar.net/helm/rmusky/100, with 3 tries remaining

2014/01/17 19:23:39 [iNFO] Pack: pixelmon-251 Image Download Worker Calculated MD5: 1d86f4d204dba8f921605ba0e3cd913c Required MD5: ad012221c98d1b294d6832a42fe6f544

2014/01/17 19:23:39 [iNFO] Starting download of http://cdn.technicpack.net/platform/pack-logos/201459.png?1389920997, with 3 tries remaining

2014/01/17 19:23:40 [iNFO] {"accessToken":"24969ad8863f49679860377716142270","clientToken":"ae811a03-c445-4e27-ac74-07102fda3621","selectedProfile":{"id":"2bcc6d0b8f124ea191441720e1881e28","name":"rmusky","legacy":true}}

2014/01/17 19:23:40 [iNFO] Launcher took: 2100ms to start

2014/01/17 19:23:36 [iNFO]  2014-01-17 19:23:36 [iNFO] [Minecraft-Client] Stopping!

2014/01/17 19:23:36 [iNFO]  2014-01-17 19:23:36 [iNFO] [sTDOUT] 

2014/01/17 19:23:36 [iNFO]  2014-01-17 19:23:36 [iNFO] [sTDOUT] SoundSystem shutting down...

2014/01/17 19:23:36 [iNFO]  2014-01-17 19:23:36 [iNFO] [sTDOUT]     Author: Paul Lamb, www.paulscode.com

2014/01/17 19:23:36 [iNFO]  2014-01-17 19:23:36 [iNFO] [sTDOUT] 

2014/01/17 19:23:42 [iNFO] Maximum usable memory detected: 8174 mb

2014/01/17 19:23:47 [iNFO] InstalledPack{info=PlatformPackInfo{name='treeit', displayName='Treeit', url='http://fs1.d-h.st/download/00091/kTz/Treeit_3.3.0.zip', icon=null, logo=net.technicpack.launchercore.restful.Resource@33fba86, background=net.technicpack.launchercore.restful.Resource@4ceeb514, minecraft='1.6.4', forge='null', version='3.3.0', solder='', forceDir=false}, name='treeit', platform=true, build='recommended', directory='launcher\treeit'}

2014/01/17 19:23:48 [iNFO] Maximum usable memory detected: 8174 mb

2014/01/17 19:23:51 [iNFO] InstalledPack{info=PlatformPackInfo{name='pixelmon-251', displayName='Pixelmon', url='http://199.191.59.130/pixelmon/Pixelmon%201.4.2.zip', icon=null, logo=net.technicpack.launchercore.restful.Resource@347eb067, background=net.technicpack.launchercore.restful.Resource@696f551d, minecraft='1.6.4', forge='null', version='1.4.2', solder='', forceDir=false}, name='pixelmon-251', platform=true, build='1.4.2', directory='%MODPACKS%\pixelmon-251'}

[Munaus]

This is not a technic launcher bug, it's a custom modpack. Contact the creator of the pack