Resolved with latest Forge
I'm also getting this error, I verified all my code. Issue is the crash report doesn't show any error line that's in my code but lists all main code so I can't figure out where I may have something off. I just dl the latest forge and will try that.
Time: 10/11/13 5:29 PM
Description: Exception in server tick loop
java.lang.NullPointerException
at net.minecraft.world.World.getBlockMaterial(World.java:598)
at net.minecraft.world.gen.feature.WorldGenLakes.generate(WorldGenLakes.java:82)
at net.minecraft.world.gen.ChunkProviderGenerate.populate(ChunkProviderGenerate.java:548)
at net.minecraft.world.gen.ChunkProviderServer.populate(ChunkProviderServer.java:258)
at net.minecraft.world.chunk.Chunk.populateChunk(Chunk.java:1253)
at net.minecraft.world.gen.ChunkProviderServer.loadChunk(ChunkProviderServer.java:153)
at net.minecraft.server.MinecraftServer.initialWorldChunkLoad(MinecraftServer.java:294)
at net.minecraft.server.integrated.IntegratedServer.loadAllWorlds(IntegratedServer.java:90)
at net.minecraft.server.integrated.IntegratedServer.startServer(IntegratedServer.java:107)
at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:445)
at net.minecraft.server.ThreadMinecraftServer.run(ThreadMinecraftServer.java:16)
A detailed walkthrough of the error, its code path and all known details is as follows:
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-- System Details --
Details:
Minecraft Version: 1.6.4
Operating System: Windows 7 (amd64) version 6.1
Java Version: 1.7.0_40, Oracle Corporation
Java VM Version: Java HotSpot 64-Bit Server VM (mixed mode), Oracle Corporation
Memory: 930664952 bytes (887 MB) / 1037959168 bytes (989 MB) up to 1037959168 bytes (989 MB)
JVM Flags: 3 total; -Xincgc -Xmx1024M -Xms1024M
AABB Pool Size: 0 (0 bytes; 0 MB) allocated, 0 (0 bytes; 0 MB) used
Suspicious classes: FML and Forge are installed
IntCache: cache: 0, tcache: 0, allocated: 3, tallocated: 63
FML: MCP v8.11 FML v6.4.20.910 Minecraft Forge 9.11.0.910 5 mods loaded, 5 mods active
mcp{8.09} [Minecraft Coder Pack] (minecraft.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available
FML{6.4.20.910} [Forge Mod Loader] (bin) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available
Forge{9.11.0.910} [Minecraft Forge] (bin) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available
lordrhys_mod{1.0} [LordRhys Mod] (bin) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available
RedstoneTutorial{v1.0.0} [Redstone Tutorial] (bin) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available
Profiler Position: N/A (disabled)
Vec3 Pool Size: 0 (0 bytes; 0 MB) allocated, 0 (0 bytes; 0 MB) used
Player Count: 0 / 8; []
Type: Integrated Server (map_client.txt)
Is Modded: Definitely; Client brand changed to 'fml,forge'