TFC runs fine for about 10-15mins, but then there is large lag spike or something that freezes the game. I usually close the game out with task manager and restart it, and works fine for another 10-15min, untill it does the same thing again. Some of the crash reports are labled as client and some as server if that matters. I have the recommended version of forge, the most recent TFC, and Optifine A3, alone with that playerAPI. I'm sure it's not optifine as I installed it in the hopes it would fix the problem. Here is that one program that Bioxx wanted people to do for crashes http://pastebin.com/27xyUjMk Here is one of the crash reports labled as client ---- Minecraft Crash Report ---- // You're mean. Time: 1/1/13 3:17 PM Description: Unexpected error java.lang.IllegalStateException: Already tesselating! at baz.b(Tessellator.java:504) at baz.b(Tessellator.java:494) at azr.a(EffectRenderer.java:139) at ban.a(EntityRenderer.java:1591) at ban.b(EntityRenderer.java:1120) at net.minecraft.client.Minecraft.J(Minecraft.java:882) at net.minecraft.client.Minecraft.run(Minecraft.java:771) 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 baz.b(Tessellator.java:504) at baz.b(Tessellator.java:494) at azr.a(EffectRenderer.java:139) at ban.a(EntityRenderer.java:1591) -- Affected level -- Details: Level name: MpServer All players: 1 total; [ays['Mazog'/120, l='MpServer', x=7687.60, y=148.62, z=-7582.56]] Chunk stats: MultiplayerChunkCache: 433 Level seed: 11010001101 Level generator: ID 00 - DEFAULT, ver 1. Features enabled: false Level generator options: Level spawn location: World: (8220,164,-9692), Chunk: (at 12,10,4 in 513,-606; contains blocks 8208,0,-9696 to 8223,255,-9681), Region: (16,-19; contains chunks 512,-608 to 543,-577, blocks 8192,0,-9728 to 8703,255,-9217) Level time: 427050 game time, 440499 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: 118 total; [EntityCreeperTFC['entity.creeper.name'/275, l='MpServer', x=7780.50, y=17.00, z=-7439.50], EntityPigTFC['entity.pig.name'/11408, l='MpServer', x=7550.32, y=150.00, z=-7541.98], EntityCowTFC['entity.cow.name'/283, l='MpServer', x=7795.53, y=147.00, z=-7489.38], EntityCowTFC['entity.cow.name'/282, l='MpServer', x=7803.69, y=151.00, z=-7491.47], EntityPigTFC['entity.pig.name'/11416, l='MpServer', x=7551.38, y=160.00, z=-7527.16], EntityCowTFC['entity.cow.name'/281, l='MpServer', x=7802.31, y=150.00, z=-7491.22], EntityCowTFC['entity.cow.name'/280, l='MpServer', x=7796.81, y=148.00, z=-7489.84], EntityEndermanTFC['entity.enderman.name'/287, l='MpServer', x=7801.50, y=29.00, z=-7439.50], EntityZombieTFC['entity.zombie.name'/286, l='MpServer', x=7792.50, y=14.00, z=-7439.50], EntityPigTFC['entity.pig.name'/258, l='MpServer', x=7766.81, y=149.00, z=-7447.84], EntityPigTFC['entity.pig.name'/256, l='MpServer', x=7775.53, y=154.00, z=-7456.06], EntityPigTFC['entity.pig.name'/257, l='MpServer', x=7771.25, y=150.00, z=-7448.50], EntityCowTFC['entity.cow.name'/262, l='MpServer', x=7786.78, y=151.00, z=-7502.03], EntityCowTFC['entity.cow.name'/263, l='MpServer', x=7779.53, y=149.00, z=-7500.13], EntityCowTFC['entity.cow.name'/261, l='MpServer', x=7785.09, y=144.00, z=-7689.13], EntityCowTFC['entity.cow.name'/264, l='MpServer', x=7789.16, y=150.00, z=-7499.28], EntityCreeperTFC['entity.creeper.name'/270, l='MpServer', x=7791.50, y=28.00, z=-7439.50], EntityCreeperTFC['entity.creeper.name'/271, l='MpServer', x=7790.50, y=28.00, z=-7439.50], EntityCreeperTFC['entity.creeper.name'/311, l='MpServer', x=7827.50, y=173.00, z=-7439.50], EntityEndermanTFC['entity.enderman.name'/289, l='MpServer', x=7803.50, y=29.00, z=-7439.50], EntitySkeletonTFC['entity.skeleton.name'/291, l='MpServer', x=7807.50, y=29.00, z=-7439.50], EntityCowTFC['entity.cow.name'/300, l='MpServer', x=7825.38, y=177.00, z=-7533.50], EntityCowTFC['entity.cow.name'/127, l='MpServer', x=7564.53, y=171.00, z=-7574.53], EntitySkeletonTFC['entity.skeleton.name'/123, l='MpServer', x=7565.50, y=16.00, z=-7699.50], ays['Mazog'/120, l='MpServer', x=7687.60, y=148.62, z=-7582.56], EntityCreeperTFC['entity.creeper.name'/137, l='MpServer', x=7566.50, y=18.00, z=-7472.50], EntityCreeperTFC['entity.creeper.name'/136, l='MpServer', x=7567.50, y=18.00, z=-7477.50], EntitySkeletonTFC['entity.skeleton.name'/139, l='MpServer', x=7562.50, y=24.00, z=-7478.50], EntityZombieTFC['entity.zombie.name'/138, l='MpServer', x=7564.50, y=28.00, z=-7483.50], EntitySkeletonTFC['entity.skeleton.name'/141, l='MpServer', x=7567.50, y=17.00, z=-7466.50], EntityZombieTFC['entity.zombie.name'/140, l='MpServer', x=7566.50, y=32.00, z=-7487.50], EntityChickenTFC['entity.chicken.name'/143, l='MpServer', x=7566.34, y=143.00, z=-7455.03], EntityZombieTFC['entity.zombie.name'/142, l='MpServer', x=7565.50, y=58.00, z=-7450.50], EntityPigTFC['entity.pig.name'/129, l='MpServer', x=7557.38, y=150.00, z=-7550.00], EntityCowTFC['entity.cow.name'/128, l='MpServer', x=7557.84, y=167.00, z=-7572.50], EntitySpiderTFC['entity.spider.name'/131, l='MpServer', x=7566.50, y=20.00, z=-7475.50], EntitySpiderTFC['entity.spider.name'/133, l='MpServer', x=7566.50, y=18.00, z=-7478.50], EntityCreeperTFC['entity.creeper.name'/132, l='MpServer', x=7566.50, y=19.00, z=-7473.50], EntityCreeperTFC['entity.creeper.name'/135, l='MpServer', x=7564.50, y=18.00, z=-7479.50], EntityZombieTFC['entity.zombie.name'/134, l='MpServer', x=7567.50, y=26.00, z=-7481.50], EntityChickenTFC['entity.chicken.name'/152, l='MpServer', x=7569.84, y=143.28, z=-7452.22], EntityPigTFC['entity.pig.name'/153, l='MpServer', x=7582.84, y=144.00, z=-7451.81], EntityPigTFC['entity.pig.name'/159, l='MpServer', x=7585.47, y=163.00, z=-7606.50], EntityChickenTFC['entity.chicken.name'/147, l='MpServer', x=7558.00, y=148.00, z=-7439.88], EntityCowTFC['entity.cow.name'/150, l='MpServer', x=7572.81, y=157.00, z=-7571.41], EntityPigTFC['entity.pig.name'/171, l='MpServer', x=7603.47, y=153.00, z=-7698.28], EntitySheepTFC['entity.sheep.name'/175, l='MpServer', x=7611.66, y=155.00, z=-7521.81], EntitySquidTFC['entity.squid.name'/649, l='MpServer', x=7735.78, y=142.39, z=-7611.25], EntityChickenTFC['entity.chicken.name'/174, l='MpServer', x=7607.09, y=154.00, z=-7530.28], EntityPigTFC['entity.pig.name'/173, l='MpServer', x=7603.47, y=161.00, z=-7601.00], EntityChickenTFC['entity.chicken.name'/172, l='MpServer', x=7612.47, y=158.00, z=-7598.00], EntityChickenTFC['entity.chicken.name'/162, l='MpServer', x=7590.53, y=160.00, z=-7523.00], EntityChickenTFC['entity.chicken.name'/165, l='MpServer', x=7589.16, y=143.48, z=-7439.88], EntityPigTFC['entity.pig.name'/164, l='MpServer', x=7587.28, y=144.00, z=-7449.90], EntityChickenTFC['entity.chicken.name'/186, l='MpServer', x=7625.31, y=153.00, z=-7512.91], EntityChickenTFC['entity.chicken.name'/187, l='MpServer', x=7630.56, y=158.00, z=-7488.91], EntityChickenTFC['entity.chicken.name'/184, l='MpServer', x=7618.25, y=149.00, z=-7539.03], EntityChickenTFC['entity.chicken.name'/185, l='MpServer', x=7622.50, y=149.00, z=-7523.25], EntityPigTFC['entity.pig.name'/190, l='MpServer', x=7640.13, y=154.00, z=-7603.28], EntityChickenTFC['entity.chicken.name'/191, l='MpServer', x=7639.25, y=152.00, z=-7594.97], EntityPigTFC['entity.pig.name'/188, l='MpServer', x=7632.97, y=152.00, z=-7682.84], EntityChickenTFC['entity.chicken.name'/189, l='MpServer', x=7644.50, y=153.00, z=-7622.41], EntityChickenTFC['entity.chicken.name'/178, l='MpServer', x=7627.34, y=152.00, z=-7635.97], EntityPigTFC['entity.pig.name'/179, l='MpServer', x=7625.50, y=158.00, z=-7630.00], EntityPigTFC['entity.pig.name'/176, l='MpServer', x=7621.91, y=152.00, z=-7684.84], EntityPigTFC['entity.pig.name'/177, l='MpServer', x=7622.03, y=153.00, z=-7680.53], EntityChickenTFC['entity.chicken.name'/182, l='MpServer', x=7619.00, y=149.00, z=-7536.25], EntityChickenTFC['entity.chicken.name'/183, l='MpServer', x=7622.25, y=149.00, z=-7535.16], EntityChickenTFC['entity.chicken.name'/180, l='MpServer', x=7627.78, y=153.00, z=-7605.63], EntityChickenTFC['entity.chicken.name'/181, l='MpServer', x=7617.25, y=157.00, z=-7590.91], EntityCowTFC['entity.cow.name'/205, l='MpServer', x=7658.50, y=148.00, z=-7461.50], EntityCowTFC['entity.cow.name'/204, l='MpServer', x=7659.81, y=148.00, z=-7461.78], EntityChickenTFC['entity.chicken.name'/207, l='MpServer', x=7676.31, y=148.00, z=-7554.88], EntitySheepTFC['entity.sheep.name'/206, l='MpServer', x=7671.16, y=150.00, z=-7579.53], EntitySheepTFC['entity.sheep.name'/201, l='MpServer', x=7655.47, y=154.00, z=-7533.66], EntitySheepTFC['entity.sheep.name'/200, l='MpServer', x=7659.09, y=153.00, z=-7538.47], EntityCowTFC['entity.cow.name'/203, l='MpServer', x=7661.53, y=153.00, z=-7486.25], EntitySheepTFC['entity.sheep.name'/202, l='MpServer', x=7659.16, y=152.00, z=-7503.94], EntityChickenTFC['entity.chicken.name'/197, l='MpServer', x=7652.44, y=158.00, z=-7612.03], EntitySheepTFC['entity.sheep.name'/196, l='MpServer', x=7652.47, y=156.00, z=-7606.53], EntityChickenTFC['entity.chicken.name'/199, l='MpServer', x=7648.97, y=149.00, z=-7577.59], EntityChickenTFC['entity.chicken.name'/198, l='MpServer', x=7653.53, y=156.00, z=-7605.84], EntityChickenTFC['entity.chicken.name'/193, l='MpServer', x=7642.31, y=147.00, z=-7507.69], EntityChickenTFC['entity.chicken.name'/192, l='MpServer', x=7642.88, y=154.00, z=-7535.50], EntitySheepTFC['entity.sheep.name'/195, l='MpServer', x=7643.38, y=147.00, z=-7507.50], EntityChickenTFC['entity.chicken.name'/194, l='MpServer', x=7640.38, y=147.00, z=-7504.56], EntitySheepTFC['entity.sheep.name'/220, l='MpServer', x=7719.06, y=148.00, z=-7544.47], EntityCowTFC['entity.cow.name'/221, l='MpServer', x=7724.41, y=199.00, z=-7511.78], EntityCowTFC['entity.cow.name'/222, l='MpServer', x=7724.50, y=199.00, z=-7510.66], EntityChickenTFC['entity.chicken.name'/213, l='MpServer', x=7716.25, y=144.00, z=-7585.88], EntitySquidTFC['entity.squid.name'/214, l='MpServer', x=7705.59, y=142.00, z=-7557.95], EntitySheepTFC['entity.sheep.name'/215, l='MpServer', x=7698.56, y=146.00, z=-7545.34], EntityCowTFC['entity.cow.name'/210, l='MpServer', x=7671.53, y=146.00, z=-7465.47], EntityCowTFC['entity.cow.name'/236, l='MpServer', x=7730.22, y=204.00, z=-7506.38], EntityCowTFC['entity.cow.name'/235, l='MpServer', x=7730.47, y=199.00, z=-7512.47], EntitySheepTFC['entity.sheep.name'/234, l='MpServer', x=7744.53, y=151.00, z=-7573.72], EntityCowTFC['entity.cow.name'/233, l='MpServer', x=7736.19, y=157.00, z=-7568.59], EntityCreeperTFC['entity.creeper.name'/4299, l='MpServer', x=7545.50, y=56.00, z=-7453.50], EntityChickenTFC['entity.chicken.name'/232, l='MpServer', x=7724.91, y=143.36, z=-7622.56], EntityChickenTFC['entity.chicken.name'/231, l='MpServer', x=7742.16, y=143.13, z=-7662.84], EntityChickenTFC['entity.chicken.name'/229, l='MpServer', x=7731.78, y=143.32, z=-7668.75], EntityCowTFC['entity.cow.name'/228, l='MpServer', x=7743.53, y=144.00, z=-7685.44], EntityChickenTFC['entity.chicken.name'/225, l='MpServer', x=7732.63, y=144.00, z=-7702.75], EntityChickenTFC['entity.chicken.name'/224, l='MpServer', x=7730.13, y=143.33, z=-7706.41], EntityCowTFC['entity.cow.name'/254, l='MpServer', x=7765.47, y=149.00, z=-7496.31], EntityPigTFC['entity.pig.name'/255, l='MpServer', x=7767.47, y=152.00, z=-7461.13], EntitySheepTFC['entity.sheep.name'/252, l='MpServer', x=7766.72, y=149.00, z=-7581.25], EntityCowTFC['entity.cow.name'/253, l='MpServer', x=7764.25, y=169.00, z=-7554.78], EntitySheepTFC['entity.sheep.name'/251, l='MpServer', x=7763.84, y=150.00, z=-7586.81], EntityChickenTFC['entity.chicken.name'/248, l='MpServer', x=7752.19, y=149.00, z=-7440.22], EntityPigTFC['entity.pig.name'/246, l='MpServer', x=7754.50, y=150.00, z=-7465.00], EntityPigTFC['entity.pig.name'/247, l='MpServer', x=7758.34, y=148.00, z=-7448.09], EntityChickenTFC['entity.chicken.name'/244, l='MpServer', x=7756.53, y=153.00, z=-7593.97], EntityCowTFC['entity.cow.name'/245, l='MpServer', x=7747.59, y=172.00, z=-7559.38], EntitySheepTFC['entity.sheep.name'/242, l='MpServer', x=7746.47, y=146.00, z=-7611.38], EntityChickenTFC['entity.chicken.name'/243, l='MpServer', x=7754.25, y=145.00, z=-7614.94], EntityCowTFC['entity.cow.name'/240, l='MpServer', x=7744.63, y=144.00, z=-7681.16], EntityChickenTFC['entity.chicken.name'/241, l='MpServer', x=7744.03, y=143.00, z=-7629.31]] Retry entities: 0 total; [] Stacktrace: at ayp.a(WorldClient.java:440) at net.minecraft.client.Minecraft.b(Minecraft.java:2401) at net.minecraft.client.Minecraft.run(Minecraft.java:794) at java.lang.Thread.run(Unknown Source) -- System Details -- Details: Minecraft Version: 1.4.6 Operating System: Windows 7 (x86) version 6.1 Java Version: 1.7.0_09, Oracle Corporation Java VM Version: Java HotSpot™ Client VM (mixed mode), Oracle Corporation Memory: 437231560 bytes (416 MB) / 721727488 bytes (688 MB) up to 1037959168 bytes (989 MB) JVM Flags: 2 total; -Xms512m -Xmx1024m AABB Pool Size: 2 (112 bytes; 0 MB) allocated, 2 (112 bytes; 0 MB) used Suspicious classes: FML and Forge are installed IntCache: cache: 0, tcache: 12576, allocated: 1, tallocated: 33 FML: MCP v7.25 FML v4.6.12.511 Minecraft Forge 6.5.0.471 Optifine OptiFine_1.4.6_HD_U_A3 4 mods loaded, 4 mods active mcp [Minecraft Coder Pack] (minecraft.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available FML [Forge Mod Loader] (coremods) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available Forge [Minecraft Forge] (coremods) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available TerraFirmaCraft [TerraFirmaCraft] (TFCraft-Universal-Core-B2-Build75.zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available LWJGL: 2.4.2 OpenGL: GeForce GT 240/PCIe/SSE2 GL version 3.3.0, NVIDIA Corporation Is Modded: Definitely; Client brand changed to 'forge,fml' Type: Client (map_client.txt) Texture Pack: Default Profiler Position: N/A (disabled) Vec3 Pool Size: 27 (1512 bytes; 0 MB) allocated, 27 (1512 bytes; 0 MB) used Here is one labled as server ---- Minecraft Crash Report ---- // Would you like a cupcake? Time: 12/31/12 10:00 PM Description: Exception in server tick loop java.lang.ClassCastException: zc cannot be cast to TFC.WorldGen.BiomeDecoratorTFC at TFC.WorldGen.Generators.WorldGenLooseRocks.generate(WorldGenLooseRocks.java:73) at TFC.WorldGen.BiomeDecoratorTFC.a(BiomeDecoratorTFC.java:129) at TFC.WorldGen.BiomeDecoratorTFC.a(BiomeDecoratorTFC.java:240) at TFC.WorldGen.TFCBiome.a(TFCBiome.java:234) at TFC.WorldGen.TFCChunkProviderGenerate.a(TFCChunkProviderGenerate.java:198) at im.a(ChunkProviderServer.java:258) at zz.a(Chunk.java:1258) at im.c(ChunkProviderServer.java:153) at il.<init>(PlayerInstance.java:44) at ik.getOrCreateChunkWatcher(PlayerManager.java:167) at ik.a(PlayerManager.java:157) at ik.a(PlayerManager.java:206) at gm.a(ServerConfigurationManager.java:163) at gm.c(ServerConfigurationManager.java:206) at gm.a(ServerConfigurationManager.java:123) at bec.b(IntegratedServerListenThread.java:96) at net.minecraft.server.MinecraftServer.r(MinecraftServer.java:702) at net.minecraft.server.MinecraftServer.q(MinecraftServer.java:598) at bdz.q(IntegratedServer.java:159) at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:497) at fy.run(SourceFile:849) A detailed walkthrough of the error, its code path and all known details is as follows: --------------------------------------------------------------------------------------- -- System Details -- Details: Minecraft Version: 1.4.6 Operating System: Windows 7 (x86) version 6.1 Java Version: 1.7.0_09, Oracle Corporation Java VM Version: Java HotSpot™ Client VM (mixed mode), Oracle Corporation Memory: 205717192 bytes (196 MB) / 464896000 bytes (443 MB) up to 1060372480 bytes (1011 MB) JVM Flags: 2 total; -Xincgc -Xmx1024m AABB Pool Size: 2386 (133616 bytes; 0 MB) allocated, 2386 (133616 bytes; 0 MB) used Suspicious classes: FML and Forge are installed IntCache: cache: 0, tcache: 13868, allocated: 1, tallocated: 31 FML: MCP v7.25 FML v4.6.12.511 Minecraft Forge 6.5.0.471 Optifine OptiFine_1.4.6_HD_U_A3 4 mods loaded, 4 mods active mcp [Minecraft Coder Pack] (minecraft.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available FML [Forge Mod Loader] (coremods) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Availabl