---- Minecraft Crash Report ----
// I let you down. Sorry :(

Time: 7/9/14 7:58 PM
Description: Exception ticking world

java.lang.IllegalArgumentException: Cannot set property bck{name=facing, clazz=class ei, values=[down, up, north, south, west, east]} to null on block minecraft:piston_extension, it is not an allowed value
	at bbw.a(SourceFile:103)
	at bbn.b(SourceFile:208)
	at bbi.a(SourceFile:365)
	at bbi.a(SourceFile:152)
	at qg.a(SourceFile:853)
	at qg.aj(SourceFile:842)
	at qg.c(SourceFile:214)
	at net.minecraft.server.MinecraftServer.x(SourceFile:578)
	at pd.x(SourceFile:285)
	at net.minecraft.server.MinecraftServer.w(SourceFile:510)
	at net.minecraft.server.MinecraftServer.run(SourceFile:426)
	at java.lang.Thread.run(Unknown Source)


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

-- Head --
Stacktrace:
	at bbw.a(SourceFile:103)
	at bbn.b(SourceFile:208)
	at bbi.a(SourceFile:365)
	at bbi.a(SourceFile:152)
	at qg.a(SourceFile:853)
	at qg.aj(SourceFile:842)
	at qg.c(SourceFile:214)

-- Affected level --
Details:
	Level name: avalon
	All players: 1 total; [qj['SilverShunketsu'/516, l='avalon', x=226.76, y=133.00, z=244.47]]
	Chunk stats: ServerChunkCache: 669 Drop: 0
	Level seed: -686741007632710309
	Level generator: ID 04 - customized, ver 0. Features enabled: true
	Level generator options: {"coordinateScale":684.412,"heightScale":684.412,"lowerLimitScale":512.0,"upperLimitScale":512.0,"depthNoiseScaleX":200.0,"depthNoiseScaleZ":200.0,"depthNoiseScaleExponent":0.5,"mainNoiseScaleX":80.0,"mainNoiseScaleY":160.0,"mainNoiseScaleZ":80.0,"baseSize":8.5,"stretchY":12.0,"biomeDepthWeight":2.0704226,"biomeDepthOffset":2.1126761,"biomeScaleWeight":1.0,"biomeScaleOffset":0.0,"seaLevel":63,"useCaves":true,"useDungeons":true,"dungeonChance":8,"useStrongholds":true,"useVillages":true,"useMineShafts":true,"useTemples":true,"useMonuments":true,"useRavines":true,"useWaterLakes":true,"waterLakeChance":4,"useLavaLakes":true,"lavaLakeChance":80,"useLavaOceans":false,"fixedBiome":-1,"biomeSize":4,"riverSize":5,"dirtSize":33,"dirtCount":10,"dirtMinHeight":0,"dirtMaxHeight":256,"gravelSize":33,"gravelCount":8,"gravelMinHeight":0,"gravelMaxHeight":256,"graniteSize":33,"graniteCount":15,"graniteMinHeight":0,"graniteMaxHeight":80,"dioriteSize":33,"dioriteCount":15,"dioriteMinHeight":0,"dioriteMaxHeight":80,"andesiteSize":33,"andesiteCount":15,"andesiteMinHeight":0,"andesiteMaxHeight":80,"coalSize":17,"coalCount":20,"coalMinHeight":0,"coalMaxHeight":128,"ironSize":15,"ironCount":20,"ironMinHeight":0,"ironMaxHeight":64,"goldSize":9,"goldCount":2,"goldMinHeight":0,"goldMaxHeight":32,"redstoneSize":8,"redstoneCount":15,"redstoneMinHeight":0,"redstoneMaxHeight":16,"diamondSize":8,"diamondCount":1,"diamondMinHeight":0,"diamondMaxHeight":16,"lapisSize":7,"lapisCount":1,"lapisCenterHeight":16,"lapisSpread":16}
	Level spawn location: 250.00,116.00,290.00 - World: (250,116,290), Chunk: (at 10,7,2 in 15,18; contains blocks 240,0,288 to 255,255,303), Region: (0,0; contains chunks 0,0 to 31,31, blocks 0,0,0 to 511,255,511)
	Level time: 24042514 game time, 6191 day time
	Level dimension: 0
	Level storage version: 0x04ABD - Anvil
	Level weather: Rain time: 3729 (now: false), thunder time: 12226 (now: false)
	Level game mode: Game mode: survival (ID 0). Hardcore: false. Cheats: true
Stacktrace:
	at net.minecraft.server.MinecraftServer.x(SourceFile:578)
	at pd.x(SourceFile:285)
	at net.minecraft.server.MinecraftServer.w(SourceFile:510)
	at net.minecraft.server.MinecraftServer.run(SourceFile:426)
	at java.lang.Thread.run(Unknown Source)

-- System Details --
Details:
	Minecraft Version: 14w28a
	Operating System: Windows XP (amd64) version 5.2
	Java Version: 1.7.0_60, Oracle Corporation
	Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
	Memory: 1709807136 bytes (1630 MB) / 2216689664 bytes (2114 MB) up to 2330460160 bytes (2222 MB)
	JVM Flags: 2 total; -Xmx2500m -Xms2G
	IntCache: cache: 0, tcache: 0, allocated: 12, tallocated: 96
	Profiler Position: N/A (disabled)
	Player Count: 1 / 20; [qj['SilverShunketsu'/516, l='avalon', x=226.76, y=133.00, z=244.47]]
	Is Modded: Unknown (can't tell)
	Type: Dedicated Server (map_server.txt)