Problem with launching modpack

[RedPow3r]

Hi, i have problem with launch modpack TPPI, RageTech, Tekkit`s and other modpack`s

How to fix this?

LOG:

 

 

 

java.util.ConcurrentModificationException

[b#439]   at java.util.ArrayList$Itr.checkForComodification(Unknown Source)

[b#439]   at java.util.ArrayList$Itr.remove(Unknown Source)

[b#439]   at net.minecraft.launchwrapper.Launch.launch(Launch.java:114)

[b#439]   at net.minecraft.launchwrapper.Launch.main(Launch.java:27)

[b#439]  Java HotSpot 64-Bit Server VM warning: ignoring option MaxPermSize=256m; support was removed in 8.0

 

What is this?

Sorry for my english.

[Melfice]

Something that should be posted on the tracker. Links to the tracker and its guidelines can be found in my signature.