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So basically 80% of the time when i click multiplayer to play pvp online i get a crash report.The only mod i have is optifine _l_c7 i have never had this problem before and puzzled as towhat could be wrong.Once i finally get the multiplayer working after restarting mc a good 20 times it is fine after that until i shut my computer off,o noticed MOST fthe time if i restarted mc with out shutting my computer off work it works fine.I have the most updated java and 64 bit operating.Here is the crash report if someone could give me some insight i would appreciate it ty!!!!!!!!!!!!!!
---- Minecraft Crash Report ----
// Everything's going to plan. No, really, that was supposed to happen.

Time: 4/5/14 11:10 AM
Description: Unexpected error

java.lang.NullPointerException: Unexpected error
at bmh.a(WorldRenderer.java:365)
at bmt.addToSortedWorldRenderers(RenderGlobal.java:2808)
at bmh.updateFinished(WorldRenderer.java:438)
at bmh.a(WorldRenderer.java:305)
at bmt.a(RenderGlobal.java:1790)
at bmm.a(EntityRenderer.java:1318)
at bmm.b(EntityRenderer.java:1144)
at azi.ah(SourceFile:787)
at azi.f(SourceFile:711)
at net.minecraft.client.main.Main.main(SourceFile:152)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at net.minecraft.launchwrapper.Launch.launch(Launch.java:131)
at net.minecraft.launchwrapper.Launch.main(Launch.java:27)


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

-- Head --
Stacktrace:
at bmh.a(WorldRenderer.java:365)
at bmt.addToSortedWorldRenderers(RenderGlobal.java:2808)
at bmh.updateFinished(WorldRenderer.java:438)
at bmh.a(WorldRenderer.java:305)
at bmt.a(RenderGlobal.java:1790)
at bmm.a(EntityRenderer.java:1318)

-- Affected level --
Details:
Level name: MpServer
All players: 29 total; [bkf['iluvpink2oo7'/10538, l='MpServer', x=-4.50, y=68.62, z=0.50], bme['arceusZX'/8557, l='MpServer', x=-0.14, y=63.06, z=0.69], bme['DougExtremPlays'/5537, l='MpServer', x=-6.31, y=64.00, z=1.22], bme['Thekingalex15467'/3720, l='MpServer', x=-2.34, y=63.00, z=8.88], bme['mjr99'/8971, l='MpServer', x=2.50, y=63.00, z=1.50], bme['rogerjordan2'/4230, l='MpServer', x=0.25, y=63.00, z=10.50], bme['animenome'/4243, l='MpServer', x=0.75, y=63.00, z=5.97], bme['WaterScreen'/10293, l='MpServer', x=2.50, y=66.00, z=2.50], bme['juejue'/5420, l='MpServer', x=9.03, y=63.00, z=8.53], bme['hughbedoobie'/5512, l='MpServer', x=10.94, y=63.00, z=0.22], bme['BadBoyCallOfDuty'/7195, l='MpServer', x=4.56, y=63.00, z=0.45], bme['lucagalodoido'/6831, l='MpServer', x=2.50, y=63.00, z=23.88], bme['_Shadow_Slayer_'/7282, l='MpServer', x=1.17, y=63.53, z=25.01], bme['IBM2000'/5969, l='MpServer', x=15.19, y=63.00, z=19.75], bme['bernardo189'/8461, l='MpServer', x=-1.60, y=63.00, z=19.71], bme['Afi4doGamer'/5359, l='MpServer', x=-2.22, y=63.00, z=16.97], bme['BlackLink_'/4062, l='MpServer', x=-5.09, y=62.20, z=20.25], bme['Ise7HD'/5668, l='MpServer', x=-1.60, y=63.89, z=30.93], bme['spencr1'/6537, l='MpServer', x=-0.50, y=63.00, z=-2.50], bme['TreyS77'/8448, l='MpServer', x=-3.50, y=63.00, z=-2.50], bme['awesomenard27'/10204, l='MpServer', x=-10.00, y=66.70, z=-10.00], bme['lightening_bug'/8134, l='MpServer', x=-0.50, y=63.00, z=-4.50], bme['quillon98'/7983, l='MpServer', x=-3.50, y=63.00, z=-1.50], bme['LucasMHT7'/10001, l='MpServer', x=3.50, y=63.00, z=-2.50], bme['raeraejr'/7290, l='MpServer', x=3.50, y=63.00, z=-4.50], bme['Pablomatador'/6091, l='MpServer', x=7.38, y=63.00, z=-1.22], bme['agleano'/9386, l='MpServer', x=4.50, y=63.02, z=-1.50], bme['MinecraftMario6'/3872, l='MpServer', x=17.88, y=64.00, z=-9.00], bme['MrBetty589'/5860, l='MpServer', x=-33.97, y=66.00, z=13.91]]
Chunk stats: MultiplayerChunkCache: 30, 30
Level seed: 0
Level generator: ID 00 - default, ver 1. Features enabled: false
Level generator options:
Level spawn location: World: (0,-1,0), Chunk: (at 0,-1,0 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: 26523 game time, 26523 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
Forced entities: 57 total; [bkf['iluvpink2oo7'/10538, l='MpServer', x=-4.50, y=68.62, z=0.50], bme['arceusZX'/8557, l='MpServer', x=-0.14, y=63.06, z=0.69], bme['DougExtremPlays'/5537, l='MpServer', x=-6.31, y=64.00, z=1.22], bme['Thekingalex15467'/3720, l='MpServer', x=-2.34, y=63.00, z=8.88], bme['raeraejr'/7290, l='MpServer', x=3.50, y=63.00, z=-4.50], bme['mjr99'/8971, l='MpServer', x=2.50, y=63.00, z=1.50], bme['lightening_bug'/8134, l='MpServer', x=-0.50, y=63.00, z=-4.50], bme['rogerjordan2'/4230, l='MpServer', x=0.25, y=63.00, z=10.50], bme['animenome'/4243, l='MpServer', x=0.75, y=63.00, z=5.97], bme['WaterScreen'/10293, l='MpServer', x=2.50, y=66.00, z=2.50], bme['juejue'/5420, l='MpServer', x=9.03, y=63.00, z=8.53], bme['hughbedoobie'/5512, l='MpServer', x=10.94, y=63.00, z=0.22], bme['Afi4doGamer'/5359, l='MpServer', x=-2.22, y=63.00, z=16.97], bme['BadBoyCallOfDuty'/7195, l='MpServer', x=4.56, y=63.00, z=0.45], bme['lucagalodoido'/6831, l='MpServer', x=2.50, y=63.00, z=23.88], bme['IBM2000'/5969, l='MpServer', x=15.19, y=63.00, z=19.75], bme['_Shadow_Slayer_'/7282, l='MpServer', x=1.17, y=63.53, z=25.01], bme['_Shadow_Slayer_'/7282, l='MpServer', x=1.17, y=63.53, z=25.01], bme['IBM2000'/5969, l='MpServer', x=15.19, y=63.00, z=19.75], bme['bernardo189'/8461, l='MpServer', x=-1.60, y=63.00, z=19.71], bme['Afi4doGamer'/5359, l='MpServer', x=-2.22, y=63.00, z=16.97], bme['Ise7HD'/5668, l='MpServer', x=-1.60, y=63.89, z=30.93], bme['BlackLink_'/4062, l='MpServer', x=-5.09, y=62.20, z=20.25], bme['TreyS77'/8448, l='MpServer', x=-3.50, y=63.00, z=-2.50], bme['spencr1'/6537, l='MpServer', x=-0.50, y=63.00, z=-2.50], bme['lightening_bug'/8134, l='MpServer', x=-0.50, y=63.00, z=-4.50], bme['awesomenard27'/10204, l='MpServer', x=-10.00, y=66.70, z=-10.00], bme['LucasMHT7'/10001, l='MpServer', x=3.50, y=63.00, z=-2.50], bme['quillon98'/7983, l='MpServer', x=-3.50, y=63.00, z=-1.50], bme['Pablomatador'/6091, l='MpServer', x=7.38, y=63.00, z=-1.22], bme['Pablomatador'/6091, l='MpServer', x=7.38, y=63.00, z=-1.22], bme['raeraejr'/7290, l='MpServer', x=3.50, y=63.00, z=-4.50], bme['MinecraftMario6'/3872, l='MpServer', x=17.88, y=64.00, z=-9.00], bme['agleano'/9386, l='MpServer', x=4.50, y=63.02, z=-1.50], bme['MrBetty589'/5860, l='MpServer', x=-33.97, y=66.00, z=13.91], bme['spencr1'/6537, l='MpServer', x=-0.50, y=63.00, z=-2.50], bme['MrBetty589'/5860, l='MpServer', x=-33.97, y=66.00, z=13.91], bme['agleano'/9386, l='MpServer', x=4.50, y=63.02, z=-1.50], bme['LucasMHT7'/10001, l='MpServer', x=3.50, y=63.00, z=-2.50], bme['rogerjordan2'/4230, l='MpServer', x=0.25, y=63.00, z=10.50], bme['lucagalodoido'/6831, l='MpServer', x=2.50, y=63.00, z=23.88], bme['animenome'/4243, l='MpServer', x=0.75, y=63.00, z=5.97], bme['arceusZX'/8557, l='MpServer', x=-0.14, y=63.06, z=0.69], bme['BlackLink_'/4062, l='MpServer', x=-5.09, y=62.20, z=20.25], bme['MinecraftMario6'/3872, l='MpServer', x=17.88, y=64.00, z=-9.00], bme['TreyS77'/8448, l='MpServer', x=-3.50, y=63.00, z=-2.50], bme['DougExtremPlays'/5537, l='MpServer', x=-6.31, y=64.00, z=1.22], bme['juejue'/5420, l='MpServer', x=9.03, y=63.00, z=8.53], bme['bernardo189'/8461, l='MpServer', x=-1.60, y=63.00, z=19.71], bme['quillon98'/7983, l='MpServer', x=-3.50, y=63.00, z=-1.50], bme['BadBoyCallOfDuty'/7195, l='MpServer', x=4.56, y=63.00, z=0.45], bme['WaterScreen'/10293, l='MpServer', x=2.50, y=66.00, z=2.50], bme['Ise7HD'/5668, l='MpServer', x=-1.60, y=63.89, z=30.93], bme['awesomenard27'/10204, l='MpServer', x=-10.00, y=66.70, z=-10.00], bme['hughbedoobie'/5512, l='MpServer', x=10.94, y=63.00, z=0.22], bme['Thekingalex15467'/3720, l='MpServer', x=-2.34, y=63.00, z=8.88], bme['mjr99'/8971, l='MpServer', x=2.50, y=63.00, z=1.50]]
Retry entities: 0 total; []
Server brand: CraftBukkit
Server type: Non-integrated multiplayer server
Stacktrace:
at bka.a(SourceFile:289)
at azi.b(SourceFile:1952)
at azi.f(SourceFile:725)
at net.minecraft.client.main.Main.main(SourceFile:152)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at net.minecraft.launchwrapper.Launch.launch(Launch.java:131)
at net.minecraft.launchwrapper.Launch.main(Launch.java:27)

-- System Details --
Details:
Minecraft Version: 1.7.4
Operating System: Windows 7 (x86) version 6.1
Java Version: 1.7.0_51, Oracle Corporation
Java VM Version: Java HotSpot(TM) Client VM (mixed mode, sharing), Oracle Corporation
Memory: 52364888 bytes (49 MB) / 170061824 bytes (162 MB) up to 518979584 bytes (494 MB)
JVM Flags: 2 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx512M
AABB Pool Size: 88 (4928 bytes; 0 MB) allocated, 88 (4928 bytes; 0 MB) used
IntCache: cache: 0, tcache: 0, allocated: 0, tallocated: 0
Launched Version: 1.7.4-OptiFine_L_C7
LWJGL: 2.9.1
OpenGL: Intel(R) HD Graphics GL version 2.1.0 - Build 8.15.10.2182, Intel
GL Caps: Using GL 1.3 multitexturing.
Using framebuffer objects because EXT_framebuffer_object is supported.
Anisotropic filtering is supported and maximum anisotropy is 2.
Shaders are available because OpenGL 2.1 is supported.

Is Modded: Very likely; Jar signature invalidated
Type: Client (map_client.txt)
Resource Packs: [LIFE 128x (Vers. 81)-1.zip]
Current Language: English (US)
Profiler Position: N/A (disabled)
Vec3 Pool Size: 63 (3528 bytes; 0 MB) allocated, 63 (3528 bytes; 0 MB) used
Anisotropic Filtering: Off (1)