Error: Internal error: java.lang.NullPointException

[DoomGamer13FTW]

Launcher/pack Version: Tekkit v 2.1

Operating System: Windows 7 Home Premium 64bit

Version of Java: v7 64bit

Description of Problem: Im Getting this error when im trying to make an item of the mods, and because i putted an item in me inventory, I can't login on someones server

Error Messages: java.lang.NullPointerException

Link to pastebin of log: http://pastebin.com/gvC3WhND

Tell me if u need any other infomation.

[Guest fondelaar]

http://forums.technicpack.net/index.php/topic,10451.15.html

last post, he says he fixed it. otherwise, let your inventory be cleared (sorry, its caused by a bugged item)

[jonassm]

@fondelaar

Hey, that's me.

Are you trying to build any Buildcraft stuff? Aparently, i had some problem with pipes from BuildCraft.