Помогите Не запускается сервер.

Хелп, что не так?
14:10:59 [SEVERE] Encountered an unexpected exception NullPointerException
java.lang.NullPointerException
at net.minecraft.world.chunk.Chunk.func_76592_a(Chunk.java:718)
at net.minecraft.world.World.func_72832_d(World.java:840)
at net.minecraft.world.gen.feature.WorldGenerator.func_76485_a(WorldGenerator.java:83)
at net.minecraft.world.gen.feature.WorldGenerator.func_76486_a(WorldGenerator.java:69)
at net.divinerpg.vethea.gen.all.WorldGenConeUp.placeBlockCircle(WorldGenConeUp.java:42)
at net.divinerpg.vethea.gen.all.WorldGenConeUp.func_76484_a(WorldGenConeUp.java:26)
at net.divinerpg.vethea.gen.ChunkProviderVethea.func_73153_a(ChunkProviderVethea.java:657)
at net.minecraft.world.gen.ChunkProviderServer.func_73153_a(ChunkProviderServer.java:364)
at net.minecraft.world.chunk.Chunk.func_76624_a(Chunk.java:1348)
at net.minecraft.world.gen.ChunkProviderServer.getChunkAt(ChunkProviderServer.java:231)
at net.minecraft.world.gen.ChunkProviderServer.func_73158_c(ChunkProviderServer.java:149)
at net.minecraft.server.MinecraftServer.func_71222_d(MinecraftServer.java:466)
at net.minecraft.server.MinecraftServer.func_71247_a(MinecraftServer.java:422)
at net.minecraft.server.dedicated.DedicatedServer.func_71197_b(DedicatedServer.java:221)
at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:618)
at net.minecraft.server.ThreadMinecraftServer.run(ThreadMinecraftServer.java:16)