Game closes when leaving "chunk" area

[coolio_ssdd]

I have been playing this mod perfectly fine since Saturday. Now it wont let me leave my "base" area without saying "shutting down internal server...."

I don't know how to find and post a source code to apply for help. If someone could please help out or if they have had this problem and you can point me to the solution that would be great. I sure don't want to lose all those man hours :(

[coolio_ssdd]

Also I just checked and created a new world and I have no problems going anywhere. It doesnt crash or anything. Oh boy. Does that mean I have to kill the world i was working on and start fresh???

[tyl.cupp]

I believe I'm having the same issue, it would be fantastic if someone could offer some help please. 

[ZzredbullzZ]

just go in to %appdata% go to .technic then modpacks attack of the b team then go to saves copy your world and past it in and try it 

[tyl.cupp]

Already tried that. Still crashes, but thanks for the advice.