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I have 2gb allocated yet I keep crashing heres the report:


---- Minecraft Crash Report ----
// Hey, that tickles! Hehehe!

Time: 12/1/13 10:52 PM
Description: Exception getting block type in world

java.lang.IllegalArgumentException: n must be positive
at java.util.Random.nextInt(Unknown Source)
at agm.a(SourceFile:122)
at agm.a(SourceFile:27)
at agg.a(SourceFile:362)
at apl.a(SourceFile:432)
at mi.a(SourceFile:160)
at aoj.a(SourceFile:778)
at mi.c(SourceFile:95)
at mi.d(SourceFile:108)
at afn.e(SourceFile:311)
at afn.a(SourceFile:249)
at afn.a(SourceFile:1720)
at aga.a(SourceFile:153)
at un.a(SourceFile:142)
at un.b(SourceFile:107)
at un.a(SourceFile:57)
at mj.b(SourceFile:144)
at net.minecraft.server.MinecraftServer.u(SourceFile:503)
at net.minecraft.server.MinecraftServer.t(SourceFile:441)
at bsk.t(SourceFile:117)
at net.minecraft.server.MinecraftServer.run(SourceFile:358)
at ky.run(SourceFile:617)


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

-- Head --
Stacktrace:
at java.util.Random.nextInt(Unknown Source)
at agm.a(SourceFile:122)
at agm.a(SourceFile:27)
at agg.a(SourceFile:362)
at apl.a(SourceFile:432)
at mi.a(SourceFile:160)
at aoj.a(SourceFile:778)
at mi.c(SourceFile:95)
at mi.d(SourceFile:108)
at afn.e(SourceFile:311)

-- Requested block coordinates --
Details:
Found chunk: true
Location: World: (12959,60,854530), Chunk: (at 15,3,2 in 809,53408; contains blocks 12944,0,854528 to 12959,255,854543), Region: (25,1669; contains chunks 800,53408 to 831,53439, blocks 12800,0,854528 to 13311,255,855039)
Stacktrace:
at afn.a(SourceFile:249)
at afn.a(SourceFile:1720)
at aga.a(SourceFile:153)
at un.a(SourceFile:142)
at un.b(SourceFile:107)
at un.a(SourceFile:57)
at mj.b(SourceFile:144)

-- Affected level --
Details:
Level name: CK 2
All players: 1 total; [mm['Creeper_King310'/494, l='CK 2', x=12980.96, y=60.58, z=854732.68]]
Chunk stats: ServerChunkCache: 1078 Drop: 0
Level seed: -5713184049586349377
Level generator: ID 02 - largeBiomes, ver 0. Features enabled: true
Level generator options:
Level spawn location: World: (-328,63,409), Chunk: (at 8,3,9 in -21,25; contains blocks -336,0,400 to -321,255,415), Region: (-1,0; contains chunks -32,0 to -1,31, blocks -512,0,0 to -1,255,511)
Level time: 1228385 game time, 38780 day time
Level dimension: 0
Level storage version: 0x04ABD - Anvil
Level weather: Rain time: 36924 (now: false), thunder time: 68702 (now: false)
Level game mode: Game mode: creative (ID 1). Hardcore: false. Cheats: true
Stacktrace:
at net.minecraft.server.MinecraftServer.u(SourceFile:503)
at net.minecraft.server.MinecraftServer.t(SourceFile:441)
at bsk.t(SourceFile:117)
at net.minecraft.server.MinecraftServer.run(SourceFile:358)
at ky.run(SourceFile:617)

-- System Details --
Details:
Minecraft Version: 1.7.2
Operating System: Windows 7 (amd64) version 6.1
Java Version: 1.7.0_25, Oracle Corporation
Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
Memory: 191172280 bytes (182 MB) / 374865920 bytes (357 MB) up to 1908932608 bytes (1820 MB)
JVM Flags: 2 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx2G
AABB Pool Size: 8939 (500584 bytes; 0 MB) allocated, 0 (0 bytes; 0 MB) used
IntCache: cache: 0, tcache: 0, allocated: 13, tallocated: 103
Profiler Position: N/A (disabled)
Vec3 Pool Size: 5208 (291648 bytes; 0 MB) allocated, 0 (0 bytes; 0 MB) used
Player Count: 1 / 8; [mm['Creeper_King310'/494, l='CK 2', x=12980.96, y=60.58, z=854732.68]]
Type: Integrated Server (map_client.txt)
Is Modded: Probably not. Jar signature remains and both client + server brands are untouched.

yes.a VERY important world that I don't have a backup of....

Probably a corrupted world. Open the world in MC-edit, select the important chunks, do CTRL-I, and select repair chunks.

Quote from Gangsir

Probably a corrupted world. Open the world in MC-edit, select the important chunks, do CTRL-I, and select repair chunks.

Thanks I'll try.Altough I kinda deleted all the chunks around the problem by mistake.......