crash report

---- Minecraft Crash Report ----
// This doesn't make any sense!

Time: 5/5/14 5:09 PM
Description: Ticking entity

java.lang.OutOfMemoryError: Java heap space
	at net.minecraft.network.packet.Packet51MapChunk.func_73594_a(Packet51MapChunk.java:276)
	at net.minecraft.network.packet.Packet56MapChunks.<init>(Packet56MapChunks.java:55)
	at net.minecraft.entity.player.EntityPlayerMP.func_70071_h_(EntityPlayerMP.java:298)
	at net.minecraft.world.World.func_72866_a(World.java:2350)
	at net.minecraft.world.WorldServer.func_72866_a(WorldServer.java:719)
	at net.minecraft.world.World.func_72870_g(World.java:2311)
	at net.minecraft.world.World.func_72939_s(World.java:2157)
	at net.minecraft.world.WorldServer.func_72939_s(WorldServer.java:550)
	at net.minecraft.server.MinecraftServer.func_71190_q(MinecraftServer.java:668)
	at net.minecraft.server.MinecraftServer.func_71217_p(MinecraftServer.java:587)
	at net.minecraft.server.integrated.IntegratedServer.func_71217_p(IntegratedServer.java:129)
	at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:484)
	at net.minecraft.server.ThreadMinecraftServer.run(SourceFile:583)


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

-- Head --
Stacktrace:
	at net.minecraft.network.packet.Packet51MapChunk.func_73594_a(Packet51MapChunk.java:276)
	at net.minecraft.network.packet.Packet56MapChunks.<init>(Packet56MapChunks.java:55)
	at net.minecraft.entity.player.EntityPlayerMP.func_70071_h_(EntityPlayerMP.java:298)
	at net.minecraft.world.World.func_72866_a(World.java:2350)
	at net.minecraft.world.WorldServer.func_72866_a(WorldServer.java:719)
	at net.minecraft.world.World.func_72870_g(World.java:2311)

-- Entity being ticked --
Details:
	Entity Type: null (net.minecraft.entity.player.EntityPlayerMP)
	Entity ID: 473
	Entity Name: latyper
	Entity's Exact location: -63.50, 149.00, -7419.50
	Entity's Block location: World: (-64,149,-7420), Chunk: (at 0,9,4 in -4,-464; contains blocks -64,0,-7424 to -49,255,-7409), Region: (-1,-15; contains chunks -32,-480 to -1,-449, blocks -512,0,-7680 to -1,255,-7169)
	Entity's Momentum: 0.00, -0.08, 0.00
Stacktrace:
	at net.minecraft.world.World.func_72939_s(World.java:2157)
	at net.minecraft.world.WorldServer.func_72939_s(WorldServer.java:550)

-- Affected level --
Details:
	Level name: TFC 1
	All players: 1 total; [EntityPlayerMP['latyper'/473, l='TFC 1', x=-63.50, y=149.00, z=-7419.50]]
	Chunk stats: ServerChunkCache: 706 Drop: 0
	Level seed: 9220201782852149725
	Level generator: ID 00 - DEFAULT, ver 1. Features enabled: true
	Level generator options:
	Level spawn location: World: (-64,149,-7420), Chunk: (at 0,9,4 in -4,-464; contains blocks -64,0,-7424 to -49,255,-7409), Region: (-1,-15; contains chunks -32,-480 to -1,-449, blocks -512,0,-7680 to -1,255,-7169)
	Level time: 14 game time, 576014 day time
	Level dimension: 0
	Level storage version: 0x04ABD - Anvil
	Level weather: Rain time: 40817 (now: false), thunder time: 64594 (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:668)
	at net.minecraft.server.MinecraftServer.func_71217_p(MinecraftServer.java:587)
	at net.minecraft.server.integrated.IntegratedServer.func_71217_p(IntegratedServer.java:129)
	at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:484)
	at net.minecraft.server.ThreadMinecraftServer.run(SourceFile:583)

-- System Details --
Details:
	Minecraft Version: 1.6.4
	Operating System: Windows 7 (amd64) version 6.1
	Java Version: 1.7.0_45, Oracle Corporation
	Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
	Memory: 49994552 bytes (47 MB) / 473956352 bytes (452 MB) up to 477102080 bytes (455 MB)
	JVM Flags: 3 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx1G -Xmx512M
	AABB Pool Size: 2835 (158760 bytes; 0 MB) allocated, 2053 (114968 bytes; 0 MB) used
	Suspicious classes: FML and Forge are installed
	IntCache: cache: 0, tcache: 0, allocated: 1, tallocated: 33
	FML: MCP v8.11 FML v6.4.49.965 Minecraft Forge 9.11.1.965 5 mods loaded, 5 mods active
	mcp{8.09} [Minecraft Coder Pack] (minecraft.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
	FML{6.4.49.965} [Forge Mod Loader] (minecraftforge-9.11.1.965.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
	Forge{9.11.1.965} [Minecraft Forge] (minecraftforge-9.11.1.965.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
	tfc_coremod{0.78.12} [TFC[coremod]] (minecraft.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
	terrafirmacraft{0.78.12} [TerraFirmaCraft] (TFC-0.78.12.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
	Profiler Position: N/A (disabled)
	Vec3 Pool Size: 502 (28112 bytes; 0 MB) allocated, 154 (8624 bytes; 0 MB) used
	Player Count: 1 / 8; [EntityPlayerMP['latyper'/473, l='TFC 1', x=-63.50, y=149.00, z=-7419.50]]
	Type: Integrated Server (map_client.txt)
	Is Modded: Definitely; Client brand changed to 'fml,forge'