Problem FTB Ultimate (MCPC+) crashes upon using portal to nether

[Keebs]

First off, sorry if I'm not allowed to post this here as its using MCPC+.

Essentially, our server crashes upon joining the Nether normally when we walk into the portal (It doesn't teleport us, just stops responding and crashes) or do /world (to switch to the nether) it will show up for a few seconds and in that time I see TONS of basalt pillars from top to bottom of the nether, then server crashes, and about five minutes later I get an error in console about it.

Pastebin startup - http://pastebin.com/PBWjwaCt
Pastebin error - http://pastebin.com/eFbc1ZaB

Plugins -
Factions
Auto Save World
Essentials, chat, and spawn.
PermissionsEx
WorldBorder
WorldEdit
WorldGuard

Any help would be much appreciated as I have NO clue whats wrong, this has never happened before.

Thanks!

 

[d4m1ty]

Have you tried just deleting the nether world folder and reattempt?
What about using preorder genng utili to build the nether before hand since you are bordered anyways? Might as well just gen out the whole server.

 

[Keebs]

Main world is completely generated, I tried to generate nether several times but just crash after crash.

I also tried disabling nether, and making it with multiverse but it didn't work so I reverted it back to single world.

Deleting the nether didnt work one bit, either.

 

[agaricus]

22

Try build L23, it has a number of multi-world fixes

 

[Keebs]

Will do, will repost if works/not

 

[Keebs]

Try build L23, it has a number of multi-world fixes

You sir, are a hero. Thank you.