Server not starting since I removed some mods.

[Flenix]

Hey guys,

I deleted a few mods from my server today, in an attempt to make it run a little smoother. However, now I'm getting this error on startup:

2013-05-22 16:06:02 [INFO] [STDERR] java.lang.NullPointerException
2013-05-22 16:06:02 [INFO] [STDERR]     at net.minecraftforge.common.ForgeChunkManager.loadWorld(ForgeChunkManager.java:527)
2013-05-22 16:06:02 [INFO] [STDERR]     at net.minecraftforge.common.ForgeInternalHandler.onDimensionLoad(ForgeInternalHandler.java:71)
2013-05-22 16:06:02 [INFO] [STDERR]     at net.minecraftforge.event.ASMEventHandler_1_ForgeInternalHandler_onDimensionLoad_Load.invoke(.dynamic)
2013-05-22 16:06:02 [INFO] [STDERR]     at net.minecraftforge.event.ASMEventHandler.invoke(ASMEventHandler.java:35)
2013-05-22 16:06:02 [INFO] [STDERR]     at net.minecraftforge.event.EventBus.post(EventBus.java:103)
2013-05-22 16:06:02 [INFO] [STDERR]     at net.minecraft.server.MinecraftServer.a(MinecraftServer.java:279)
2013-05-22 16:06:02 [INFO] [STDERR]     at ho.c(DedicatedServer.java:180)
2013-05-22 16:06:02 [INFO] [STDERR]     at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:458)
2013-05-22 16:06:02 [INFO] [STDERR]     at fy.run(SourceFile:849)
2013-05-22 16:06:02 [SEVERE] [Minecraft] Encountered an unexpected exception NullPointerException
java.lang.NullPointerException
        at net.minecraftforge.common.ForgeChunkManager.loadWorld(ForgeChunkManager.java:527)
        at net.minecraftforge.common.ForgeInternalHandler.onDimensionLoad(ForgeInternalHandler.java:71)
        at net.minecraftforge.event.ASMEventHandler_1_ForgeInternalHandler_onDimensionLoad_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:279)
        at ho.c(DedicatedServer.java:180)
        at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:458)
        at fy.run(SourceFile:849)

What a lovely useful stacktrace! No reference to a specific mod.
I've removed all the configs for the mods I removed. Here's the list of mods I removed. Anyone got any ideas?
Astralcraft
Biolock
Chargepads
Chickenchunks
Flans
FluidMechanics
Gravisuite
Liquid XP
Mystcraft
Obsidiplates
Petrogen
Portalgun
Still Hungry
Thaumic Bees
Tinkers Contruct

 

[Neil_50437]

Removing mods that have effected the world is a very bad idea.