---- Minecraft Crash Report ----
// My bad.

Time: 8/12/2557, 21:17 น.
Description: Exception getting block type in world

java.lang.IllegalArgumentException
at net.minecraft.util.WeightedRandom.func_76273_a(WeightedRandom.java:28)
at net.minecraft.util.WeightedRandom.func_76271_a(WeightedRandom.java:60)
at net.minecraft.world.SpawnerAnimals.func_77191_a(SpawnerAnimals.java:337)
at net.minecraft.world.gen.ChunkProviderGenerate.func_73153_a(ChunkProviderGenerate.java:424)
at net.minecraft.world.gen.ChunkProviderServer.func_73153_a(ChunkProviderServer.java:279)
at net.minecraft.world.chunk.Chunk.func_76624_a(Chunk.java:1055)
at net.minecraft.world.gen.ChunkProviderServer.originalLoadChunk(ChunkProviderServer.java:190)
at net.minecraft.world.gen.ChunkProviderServer.loadChunk(ChunkProviderServer.java:131)
at net.minecraft.world.gen.ChunkProviderServer.func_73158_c(ChunkProviderServer.java:101)
at net.minecraft.world.gen.ChunkProviderServer.func_73154_d(ChunkProviderServer.java:199)
at net.minecraft.world.World.func_72964_e(World.java:419)
at net.minecraft.world.World.func_147439_a(World.java:345)
at net.minecraft.world.World.func_147437_c(World.java:365)
at biomesoplenty.common.world.WorldProviderSurfaceBOP.getTopBlockCoord(WorldProviderSurfaceBOP.java:42)
at biomesoplenty.common.world.WorldProviderSurfaceBOP.func_76566_a(WorldProviderSurfaceBOP.java:14)
at net.minecraft.world.WorldServer.func_73052_b(WorldServer.java:749)
at net.minecraft.world.WorldServer.func_72963_a(WorldServer.java:715)
at WorldServerOF.func_72963_a(WorldServerOF.java:80)
at net.minecraft.world.World.(World.java:260)
at net.minecraft.world.WorldServer.(WorldServer.java:97)
at WorldServerOF.(WorldServerOF.java:69)
at net.minecraft.server.integrated.IntegratedServer.func_71247_a(IntegratedServer.java:65)
at net.minecraft.server.integrated.IntegratedServer.func_71197_b(IntegratedServer.java:153)
at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:387)
at net.minecraft.server.MinecraftServer$2.run(MinecraftServer.java:685)

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

-- Head --
Stacktrace:
at net.minecraft.util.WeightedRandom.func_76273_a(WeightedRandom.java:28)
at net.minecraft.util.WeightedRandom.func_76271_a(WeightedRandom.java:60)
at net.minecraft.world.SpawnerAnimals.func_77191_a(SpawnerAnimals.java:337)
at net.minecraft.world.gen.ChunkProviderGenerate.func_73153_a(ChunkProviderGenerate.java:424)
at net.minecraft.world.gen.ChunkProviderServer.func_73153_a(ChunkProviderServer.java:279)
at net.minecraft.world.chunk.Chunk.func_76624_a(Chunk.java:1055)
at net.minecraft.world.gen.ChunkProviderServer.originalLoadChunk(ChunkProviderServer.java:190)
at net.minecraft.world.gen.ChunkProviderServer.loadChunk(ChunkProviderServer.java:131)
at net.minecraft.world.gen.ChunkProviderServer.func_73158_c(ChunkProviderServer.java:101)
at net.minecraft.world.gen.ChunkProviderServer.func_73154_d(ChunkProviderServer.java:199)
at net.minecraft.world.World.func_72964_e(World.java:419)

-- Requested block coordinates --
Details:
Found chunk: true
Location: World: (-711,64,1016), Chunk: (at 9,4,8 in -45,63; contains blocks -720,0,1008 to -705,255,1023), Region: (-2,1; contains chunks -64,32 to -33,63, blocks -1024,0,512 to -513,255,1023)
Stacktrace:
at net.minecraft.world.World.func_147439_a(World.java:345)
at net.minecraft.world.World.func_147437_c(World.java:365)
at biomesoplenty.common.world.WorldProviderSurfaceBOP.getTopBlockCoord(WorldProviderSurfaceBOP.java:42)
at biomesoplenty.common.world.WorldProviderSurfaceBOP.func_76566_a(WorldProviderSurfaceBOP.java:14)
at net.minecraft.world.WorldServer.func_73052_b(WorldServer.java:749)
at net.minecraft.world.WorldServer.func_72963_a(WorldServer.java:715)
at WorldServerOF.func_72963_a(WorldServerOF.java:80)

-- Affected level --
Details:
Level name: New World
All players: 0 total; []
Chunk stats: ServerChunkCache: 28 Drop: 0
Level seed: 2622198658167549381
Level generator: ID 04 - BIOMESOP, ver 0. Features enabled: true
Level generator options:
Level spawn location: World: (0,0,0), Chunk: (at 0,0,0 in 0,0; contains blocks 0,0,0 to 15,255,15), Region: (0,0; contains chunks 0,0 to 31,31, blocks 0,0,0 to 511,255,511)
Level time: 0 game time, 0 day time
Level dimension: 0
Level storage version: 0x04ABD - Anvil
Level weather: Rain time: 0 (now: false), thunder time: 0 (now: false)
Level game mode: Game mode: creative (ID 1). Hardcore: false. Cheats: true
Stacktrace:
at net.minecraft.world.World.(World.java:260)
at net.minecraft.world.WorldServer.(WorldServer.java:97)
at WorldServerOF.(WorldServerOF.java:69)
at net.minecraft.server.integrated.IntegratedServer.func_71247_a(IntegratedServer.java:65)
at net.minecraft.server.integrated.IntegratedServer.func_71197_b(IntegratedServer.java:153)
at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:387)
at net.minecraft.server.MinecraftServer$2.run(MinecraftServer.java:685)

-- System Details --
Details:
Minecraft Version: 1.7.10
Operating System: Windows 7 (x86) version 6.1
Java Version: 1.7.0_71, Oracle Corporation
Java VM Version: Java HotSpot(TM) Client VM (mixed mode), Oracle Corporation
Memory: 863740496 bytes (823 MB) / 1060372480 bytes (1011 MB) up to 1060372480 bytes (1011 MB)
JVM Flags: 4 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xincgc -Xmx1g -Xms1g
AABB Pool Size: 0 (0 bytes; 0 MB) allocated, 0 (0 bytes; 0 MB) used
IntCache: cache: 0, tcache: 0, allocated: 13, tallocated: 96
FML: MCP v9.05 FML v7.10.85.1258 Minecraft Forge 10.13.2.1258 Optifine OptiFine_1.7.10_HD_U_B1 20 mods loaded, 20 mods active
mcp{9.05} Minecraft Coder Pack Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available
FML{7.10.85.1258} Forge Mod Loader Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available
Forge{10.13.2.1258} Minecraft Forge Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available
CodeChickenCore{1.0.4.29} CodeChicken Core Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available
Micdoodlecore{} Micdoodle8 Core Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available
NotEnoughItems{1.0.3.64} Not Enough Items Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available
DamageIndicatorsMod{3.2.0} Damage Indicators Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available
bspkrsCore{6.14} bspkrsCore Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available
Treecapitator{1.7.2} Treecapitator Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available
Backpack{2.0.0} Backpack Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available
BaymaxMod{1.7.10} BaymaxMod Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available
BiomesOPlenty{2.1.0} Biomes O' Plenty Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available
BlockUtils{1.0.0} Block Util's Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available
colourfulportalsmod{1.4.2} Colourful Portals Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available
GalacticraftCore{3.0.6} Galacticraft Core Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available
GalacticraftMars{3.0.6} Galacticraft Planets Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available
MorePlanet{1.0.7} More Planet's Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available
NBTEdit{1.7.2.2} In-game NBTEdit Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available
ReiMinimap{1.7.10} Rei's Minimap Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available
chunkbase_slimemod_ssp{2.1} Slime Mod (SSP) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available
Profiler Position: N/A (disabled)
Player Count: 0 / 8; []
Type: Integrated Server (map_client.txt)
Is Modded: Definitely; Client brand changed to 'fml,forge'

report to minecraftforums and tell them about the crash

at net.minecraft.world.SpawnerAnimals.func_77191_a(SpawnerAnimals.java:337)
at net.minecraft.world.gen.ChunkProviderGenerate.func_73153_a(ChunkProviderGenerate.java:424)
at net.minecraft.world.gen.ChunkProviderServer.func_73153_a(ChunkProviderServer.java:279)
at net.minecraft.world.chunk.Chunk.func_76624_a(Chunk.java:1055)
at net.minecraft.world.gen.ChunkProviderServer.originalLoadChunk(ChunkProviderServer.java:190)
at net.minecraft.world.gen.ChunkProviderServer.loadChunk(ChunkProviderServer.java:131)
at net.minecraft.world.gen.ChunkProviderServer.func_73158_c(ChunkProviderServer.java:101)
at net.minecraft.world.gen.ChunkProviderServer.func_73154_d(ChunkProviderServer.java:199)

btw: check your config