Direwolf20 Pack(v4) crashing when sending minecart through mystcraft portal

[Jaks]

http://pastebin.com/yEhPxEbV

I get this error when I try to send a minecart through a mystcraft portal
when I go through, there are no problems. It only happens when I try to send a minecart, the game crashes.

 

[Ashzification]

You can't do that. It's broken.