---- Minecraft Crash Report ----
// Oh - I know what I did wrong!

Time: 11/10/12 8:11 PM
Description: Exception in server tick loop

java.lang.IllegalArgumentException: Failed to register dimension for id 0, One is already registered
	at net.minecraftforge.common.DimensionManager.registerDimension(DimensionManager.java:66)
	at xcompwiz.mystcraft.MystcraftEventHandler.registerDimensions(MystcraftEventHandler.java:50)
	at xcompwiz.mystcraft.MystcraftEventHandler.handleWorldLoadEvent(MystcraftEventHandler.java:37)
	at net.minecraftforge.event.ASMEventHandler_58_MystcraftEventHandler_handleWorldLoadEvent_Load.invoke(.dynamic)
	at net.minecraftforge.event.ASMEventHandler.invoke(ASMEventHandler.java:35)
	at net.minecraftforge.event.EventBus.post(EventBus.java:103)
	at net.minecraft.server.MinecraftServer.a(MinecraftServer.java:278)
	at hg.c(DedicatedServer.java:153)
	at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:454)
	at fp.run(SourceFile:818)

Relevant Details:
- Minecraft Version: 1.4.2
- Operating System: Windows 7 (amd64) version 6.1
- Java Version: 1.7.0_07, Oracle Corporation
- Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
- Memory: 495510472 bytes (472 MB) / 519110656 bytes (495 MB) up to 1037959168 bytes (989 MB)
- JVM Flags: 2 total; -Xms512M -Xmx1G
- AABB Pool Size: 0 (0 bytes; 0 MB) allocated, 0 (0 bytes; 0 MB) used
- FML: ~ERROR~ NullPointerException: null
- Is Modded: Definitely; 'forge,fml'
- Profiler Position: N/A (disabled)
- Vec3 Pool Size: 0 (0 bytes; 0 MB) allocated, 0 (0 bytes; 0 MB) used
- Player Count: 0 / 20; []
- World world Entities: 0 total; []
- World world Players: 0 total; []
- World world Chunk Stats: ServerChunkCache: 0 Drop: 0
- Type: Dedicated Server