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So when I enter the Twilight Forest I crash, this is on a server with my friends, can anyone help me?


Here is the crash report:


---- Minecraft Crash Report ----
// Uh... Did I do that?

Time: 6/13/13 5:51 AM
Description: Exception getting block type in world

java.util.ConcurrentModificationException
at java.util.HashMap$Ha­erator.nextEntry(Unknown Source)
at java.util.HashMap$ValueIterator.next(Unknown Source)
at net.minecraft.world.gen.structure.MapGenStructure.func_75051_a(SourceFile:70)
at twilightforest.world.ChunkProviderTwilightForest.func_73153_a(ChunkProviderTwilightForest.java:898)
at net.minecraft.world.gen.ChunkProviderServer.func_73153_a(ChunkProviderServer.java:258)
at net.minecraft.world.chunk.Chunk.func_76624_a(Chunk.java:1239)
at net.minecraft.world.gen.ChunkProviderServer.func_73158_c(ChunkProviderServer.java:153)
at net.minecraft.world.gen.ChunkProviderServer.func_73154_d(ChunkProviderServer.java:166)
at net.minecraft.world.World.func_72964_e(World.java:528)
at net.minecraft.world.World.func_72798_a(World.java:413)
at net.minecraft.world.gen.feature.WorldGenMinable.func_76484_a(WorldGenMinable.java:77)
at domi1819.gemscraft.util.GCWorldGenerator.genSurface(GCWorldGenerator.java:78)
at domi1819.gemscraft.util.GCWorldGenerator.genOther(GCWorldGenerator.java:104)
at domi1819.gemscraft.util.GCWorldGenerator.generate(GCWorldGenerator.java:20)
at cpw.mods.fml.common.registry.GameRegistry.generateWorld(GameRegistry.java:102)
at net.minecraft.world.gen.ChunkProviderServer.func_73153_a(ChunkProviderServer.java:259)
at net.minecraft.world.chunk.Chunk.func_76624_a(Chunk.java:1249)
at net.minecraft.world.gen.ChunkProviderServer.func_73158_c(ChunkProviderServer.java:153)
at net.minecraft.world.gen.ChunkProviderServer.func_73154_d(ChunkProviderServer.java:166)
at net.minecraft.world.World.func_72964_e(World.java:528)
at net.minecraft.world.SpawnerAnimals.func_77189_a(SpawnerAnimals.java:41)
at net.minecraft.world.SpawnerAnimals.func_77192_a(SpawnerAnimals.java:113)
at net.minecraft.world.WorldServer.func_72835_b(WorldServer.java:180)
at net.minecraft.server.MinecraftServer.func_71190_q(MinecraftServer.java:642)
at net.minecraft.server.dedicated.DedicatedServer.func_71190_q(DedicatedServer.java:275)
at net.minecraft.server.MinecraftServer.func_71217_p(MinecraftServer.java:572)
at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:470)
at net.minecraft.server.ThreadMinecraftServer.run(SourceFile:573)


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

-- Head --
Stacktrace:
at java.util.HashMap$Ha­erator.nextEntry(Unknown Source)
at java.util.HashMap$ValueIterator.next(Unknown Source)
at net.minecraft.world.gen.structure.MapGenStructure.func_75051_a(SourceFile:70)
at twilightforest.world.ChunkProviderTwilightForest.func_73153_a(ChunkProviderTwilightForest.java:898)
at net.minecraft.world.gen.ChunkProviderServer.func_73153_a(ChunkProviderServer.java:258)
at net.minecraft.world.chunk.Chunk.func_76624_a(Chunk.java:1239)
at net.minecraft.world.gen.ChunkProviderServer.func_73158_c(ChunkProviderServer.java:153)
at net.minecraft.world.gen.ChunkProviderServer.func_73154_d(ChunkProviderServer.java:166)
at net.minecraft.world.World.func_72964_e(World.java:528)

-- Requested block coordinates --
Details:
Found chunk: true
Location: World: (4373,9,-2297), Chunk: (at 5,0,7 in 273,-144; contains blocks 4368,0,-2304 to 4383,255,-2289), Region: (8,-5; contains chunks 256,-160 to 287,-129, blocks 4096,0,-2560 to 4607,255,-2049)
Stacktrace:
at net.minecraft.world.World.func_72798_a(World.java:413)
at net.minecraft.world.gen.feature.WorldGenMinable.func_76484_a(WorldGenMinable.java:77)
at domi1819.gemscraft.util.GCWorldGenerator.genSurface(GCWorldGenerator.java:78)
at domi1819.gemscraft.util.GCWorldGenerator.genOther(GCWorldGenerator.java:104)
at domi1819.gemscraft.util.GCWorldGenerator.generate(GCWorldGenerator.java:20)
at cpw.mods.fml.common.registry.GameRegistry.generateWorld(GameRegistry.java:102)
at net.minecraft.world.gen.ChunkProviderServer.func_73153_a(ChunkProviderServer.java:259)
at net.minecraft.world.chunk.Chunk.func_76624_a(Chunk.java:1249)
at net.minecraft.world.gen.ChunkProviderServer.func_73158_c(ChunkProviderServer.java:153)
at net.minecraft.world.gen.ChunkProviderServer.func_73154_d(ChunkProviderServer.java:166)
at net.minecraft.world.World.func_72964_e(World.java:528)
at net.minecraft.world.SpawnerAnimals.func_77189_a(SpawnerAnimals.java:41)
at net.minecraft.world.SpawnerAnimals.func_77192_a(SpawnerAnimals.java:113)
at net.minecraft.world.WorldServer.func_72835_b(WorldServer.java:180)

-- Affected level --
Details:
Level name: worl
All players: 1 total; [EntityPlayerMP['EvilToast333'/737, l='worl', x=241.00, y=92.92, z=-230.00]]
Chunk stats: ServerChunkCache: 3226 Drop: 0
Level seed: 1441365095
Level generator: ID 00 - default, ver 1. Features enabled: false
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: 0x00000 - Unknown?
Level weather: Rain time: 0 (now: false), thunder time: 0 (now: false)
Level game mode: Game mode: survival (ID 0). Hardcore: false. Cheats: false
Stacktrace:
at net.minecraft.server.MinecraftServer.func_71190_q(MinecraftServer.java:642)
at net.minecraft.server.dedicated.DedicatedServer.func_71190_q(DedicatedServer.java:275)
at net.minecraft.server.MinecraftServer.func_71217_p(MinecraftServer.java:572)
at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:470)
at net.minecraft.server.ThreadMinecraftServer.run(SourceFile:573)

-- System Details --
Details:
Minecraft Version: 1.5.2
Operating System: Windows 8 (amd64) version 6.2
Java Version: 1.7.0_17, Oracle Corporation
Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
Memory: 158074720 bytes (150 MB) / 967245824 bytes (922 MB) up to 967245824 bytes (922 MB)
JVM Flags: 2 total; -Xmx1024M -Xms1024M
AABB Pool Size: 4223017 (236488952 bytes; 225 MB) allocated, 4223017 (236488952 bytes; 225 MB) used
Suspicious classes: FML and Forge are installed
IntCache: cache: 0, tcache: 0, allocated: 1, tallocated: 32
FML: MCP v7.51 FML v5.2.21.733 Minecraft Forge 7.8.0.733 23 mods loaded, 23 mods active
mcp{7.44} [Minecraft Coder Pack] (minecraft.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
FML{5.2.21.733} [Forge Mod Loader] (coremods) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
Forge{7.8.0.733} [Minecraft Forge] (coremods) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
CodeChickenCore{0.8.6.15} [CodeChicken Core] (coremods) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
NotEnoughItems{1.5.2.25} [Not Enough Items] (coremods) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
BetterFurnaces{3.2} [Better Furnaces] ([1.5.2]BetterFurnacesV3.2.zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
Backpack{1.9.11} [Backpack] (backpack-1.9.11-1.5.2 (1)) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
CastleDef{1.0.0} [Castle Defenders] (CastleDefenders1.2.zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
CustomSpawner{2.2.2} [DrZhark's CustomSpawner] (CustomMobSpawner 2.2.2.zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
MoCreatures{5.2.3} [DrZhark's Mo'Creatures Mod] (DrZharks MoCreatures Mod v5.2.3.zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
eplus{1.14.6} [Enchanting Plus] (EnchantingPlus-1.14.6.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
EnderStorage{1.4.2.11} [EnderStorage] (EnderStorage 1.4.2.11.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
GemsCraft{2.9} [GemsCraft] (GemsCraft-2.9_SRG (3).zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
inventorytweaks{1.54b} [Inventory Tweaks] (InventoryTweaks-1.54b.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
IronChest{5.2.4.391} [Iron Chest] (Iron-Chests-Mod-1.5.2.zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
More Bows{1.5_v1} [More Bows mod] (More bows 1.5.2_2 Forge.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
Palaria_Palariamod{2.5.8 Beta} [Palaria] (Palaria Mod v2.5.8 beta.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
cuchaz.powerTools{1.1} [Power Tools] (powerTools-v11.zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
StevesCarts{2.0.0.a120} [Steve's Carts] (StevesCarts2.0.0.a120.zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
Thaumcraft{3.0.5e} [Thaumcraft] (Thaumcraft3.0.5e.zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
TC{4.0.1_002} [Traincraft] (traincraft-4.0.1_002.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
TwilightForest{1.18.1} [The Twilight Forest] (twilightforest-1.18.1.zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
weaponmod{1.5.2 v1.12.0} [Balkon's WeaponMod] (WeaponMod.zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
Profiler Position: N/A (disabled)
Vec3 Pool Size: 0 (0 bytes; 0 MB) allocated, 0 (0 bytes; 0 MB) used
Player Count: 1 / 5; [EntityPlayerMP['EvilToast333'/737, l='worl', x=241.00, y=92.92, z=-230.00]]
Is Modded: Definitely; Server brand changed to 'fml,forge'
Type: Dedicated Server (map_server.txt)

I am also having the issue.
I believe it's having trouble loading in stuff. I think with you It may be Gemscraft. For me I keep seeing that it's trying to Spawn Greatwood Trees from Thaumcraft.