FTB Ultimate crashing because of exception ticking world!

[J4Y1450]

Everytime I open up my world the game crashes and I don't know what the problem is. I've tried disabling the season module in railcraft, but the game still crashes. This is what shows up.

---- Minecraft Crash Report ----
// I bet Cylons wouldn't have this problem.
Time: 30/10/13 4:43 PM
Description: Exception ticking world
java.lang.RuntimeException: java.lang.NullPointerException
at ic2.core.IC2.onLivingSpecialSpawn(IC2.java:2270)
at net.minecraftforge.event.ASMEventHandler_60_IC2_onLivingSpecialSpawn_LivingSpecialSpawnEvent.invoke(.dynamic)
at net.minecraftforge.event.ASMEventHandler.invoke(ASMEventHandler.java:35)
at net.minecraftforge.event.EventBus.post(EventBus.java:103)
at net.minecraftforge.event.ForgeEventFactory.doSpecialSpawn(ForgeEventFactory.java:52)
at yp.a(SpawnerAnimals.java:245)
at yp.a(SpawnerAnimals.java:187)
at in.b(WorldServer.java:162)
at net.minecraft.server.MinecraftServer.r(MinecraftServer.java:669)
at net.minecraft.server.MinecraftServer.q(MinecraftServer.java:599)
at bdz.q(IntegratedServer.java:123)
at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:497)
at fy.run(SourceFile:849)
Caused by: java.lang.NullPointerException
at ic2.core.IC2.onLivingSpecialSpawn(IC2.java:2268)

 

[lavarthan]

This appears to be a problem with an Easter Egg from Railcraft. You need to edit the config referenced in this post.