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Hello
My Minecraft crashed after I updated it and all my mods (I actually took out a mod and added a new one in) and I don't know why! I tried making a new world to just see if its my old worlds and it was, so here's a crash report:

---- Minecraft Crash Report ----
// You're mean.
Time: 4/6/13 11:31 AM
Description: Exception in server tick loop
java.lang.NullPointerException
at net.minecraft.server.management.ServerConfigurationManager.func_72355_a(ServerConfigurationManager.java:120)
at net.minecraft.server.integrated.IntegratedServerListenThread.func_71747_b(IntegratedServerListenThread.java:97)
at net.minecraft.server.MinecraftServer.func_71190_q(MinecraftServer.java:674)
at net.minecraft.server.MinecraftServer.func_71217_p(MinecraftServer.java:570)
at net.minecraft.server.integrated.IntegratedServer.func_71217_p(IntegratedServer.java:171)
at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:468)
at net.minecraft.server.ThreadMinecraftServer.run(SourceFile:573)

A detailed walkthrough of the error, its code path and all known details is as follows:
---------------------------------------------------------------------------------------
-- System Details --
Details:
Minecraft Version: 1.5.1
Operating System: Windows 7 (amd64) version 6.1
Java Version: 1.6.0_27, Sun Microsystems Inc.
Java VM Version: Java HotSpot™ 64-Bit Server VM (mixed mode), Sun Microsystems Inc.
Memory: 528107344 bytes (503 MB) / 660865024 bytes (630 MB) up to 954466304 bytes (910 MB)
JVM Flags: 2 total; -Xms512m -Xmx1024m
AABB Pool Size: 2210 (123760 bytes; 0 MB) allocated, 2210 (123760 bytes; 0 MB) used
Suspicious classes: FML and Forge are installed
IntCache: cache: 0, tcache: 0, allocated: 1, tallocated: 71
FML: MCP v7.44 FML v5.1.8.611 Minecraft Forge 7.7.1.611 Optifine OptiFine_1.5.1_HD_U_B1 9 mods loaded, 9 mods active
mcp [Minecraft Coder Pack] (minecraft.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
FML [Forge Mod Loader] (coremods) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
Forge [Minecraft Forge] (coremods) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
CodeChickenCore [CodeChicken Core] (coremods) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
NotEnoughItems [Not Enough Items] (coremods) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
DamageIndicatorsMod [Damage Indicators] ([1.5.1]DamageIndicators v2.5.7.1.zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
ExtrabiomesXL [ExtrabiomesXL] (ExtrabiomesXL-universal-1.5.1-3.12.0.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
MinecraftMadness [Minecraft Madness] (MinecraftMadness-151.zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
mod_ocarina [The Ocarina Mod] (OcarinaMod3.1.zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
Profiler Position: N/A (disabled)
Vec3 Pool Size: 259 (14504 bytes; 0 MB) allocated, 259 (14504 bytes; 0 MB) used
Player Count: 0 / 8; []
Type: Integrated Server (map_client.txt)
Is Modded: Definitely; Client brand changed to 'forge,fml'



Mods:

Optifine 1.5.1_U_HD_B1
Minecraft Coder Pack 7.44
Forge Mod Loader 5.1.8.611
Minecraft Forge 7.7.1.611
CodeChicken Core 0.8.5.4
Not Enough Items 1.5.2.8
Damage Indicators 2.5.7.1
Minecraft Madness (MC 1.5.1)
The Ocarina Mod 3.1
ExtrabiomesXL 3.12.0

And those should be all my mods.

Quote from webrosc

which mod did you add in? was it working before that mod was added?

I added in Extrabiomes XL, and I took out the Runic Dust mod (both the core and the mod itself) But Extrabiomes XL isn't the problem, I took it out and tried it then and it still crashed.