I get error when making world

[Xetapro12]

Hello, i making a mod called ZapCraft and i need help for i get no error all is fine but when i lunch minecraft and Press new world and try it crash can anny help me there oute i realy wish i can fix it myself but i dont know how

 

here the Crash report:

---- Minecraft Crash Report ----

// Why is it breaking

 

Time: 10/26/14 2:08 PM

Description: Exception in server tick loop

 

java.lang.NullPointerException: Exception in server tick loop

at net.minecraft.world.chunk.storage.ExtendedBlockStorage.func_150818_a(ExtendedBlockStorage.java:86)

at net.minecraft.world.chunk.Chunk.func_150807_a(Chunk.java:653)

at net.minecraft.world.World.setBlock(World.java:511)

at net.minecraft.world.gen.feature.WorldGenMinable.generate(WorldGenMinable.java:79)

at com.ZapCraft.World.WorldGenZap.generateSurface(WorldGenZap.java:28)

at com.ZapCraft.World.WorldGenZap.generate(WorldGenZap.java:20)

at cpw.mods.fml.common.registry.GameRegistry.generateWorld(GameRegistry.java:106)

at net.minecraft.world.gen.ChunkProviderServer.populate(ChunkProviderServer.java:261)

at net.minecraft.world.chunk.Chunk.populateChunk(Chunk.java:1149)

at net.minecraft.world.gen.ChunkProviderServer.loadChunk(ChunkProviderServer.java:155)

at net.minecraft.server.MinecraftServer.initialWorldChunkLoad(MinecraftServer.java:297)

at net.minecraft.server.integrated.IntegratedServer.loadAllWorlds(IntegratedServer.java:79)

at net.minecraft.server.integrated.IntegratedServer.startServer(IntegratedServer.java:96)

at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:432)

at net.minecraft.server.MinecraftServer$2.run(MinecraftServer.java:736)

 

 

A detailed walkthrough of the error, its code path and all known details is as follows:

---------------------------------------------------------------------------------------

 

-- System Details --

Details:

Minecraft Version: 1.7.2

Operating System: Windows 8 (amd64) version 6.2

Java Version: 1.7.0_71, Oracle Corporation

Java VM Version: Java HotSpot 64-Bit Server VM (mixed mode), Oracle Corporation

Memory: 898893592 bytes (857 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

IntCache: cache: 0, tcache: 0, allocated: 13, tallocated: 95

FML: MCP v9.03 FML v7.2.211.1121 Minecraft Forge 10.12.2.1121 4 mods loaded, 4 mods active

mcp{9.03} [Minecraft Coder Pack] (minecraft.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available

FML{7.2.211.1121} [Forge Mod Loader] (forgeSrc-1.7.2-10.12.2.1121.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available

Forge{10.12.2.1121} [Minecraft Forge] (forgeSrc-1.7.2-10.12.2.1121.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available

ZapCraft{1.7.2} [ZapCraft] (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'

[larsgerrits]

...

at com.ZapCraft.World.WorldGenZap.generateSurface(WorldGenZap.java:28)

...

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