My Server crashes on startup. It was fine before 30/10/2014 6:07AM AEST I attempted running 3 times before the Error written

Minecraft Crash Report ----
// This doesn't make any sense!

Time: 30/10/14 6:10 AM
Description: Exception in server tick loop

java.lang.NullPointerException: Exception in server tick loop
at ss.g(SourceFile:132)
at pn.z(SourceFile:99)
at pn.<init>(SourceFile:25)
at po.i(SourceFile:171)
at net.minecraft.server.MinecraftServer.run(SourceFile:417)
at java.lang.Thread.run(Unknown Source)