I did my best to install TFCraft correctly, with no other mods except for Optifine. Got a crash with this particular text: ---- Minecraft Crash Report ----// My bad.Time: 5/6/14 1:51 PMDescription: Exception in server tick loopjava.lang.NoClassDefFoundError: TFC/Entities/AI/AIEatGrass at java.lang.Class.getDeclaredConstructors0(Native Method) at java.lang.Class.privateGetDeclaredConstructors(Unknown Source) at java.lang.Class.getConstructor0(Unknown Source) at java.lang.Class.getConstructor(Unknown Source) at TFC.WorldGen.SpawnerAnimalsTFC.performWorldGenSpawning(SpawnerAnimalsTFC.java:277) at TFC.WorldGen.TFCChunkProviderGenerate.func_73153_a(TFCChunkProviderGenerate.java:204) at net.minecraft.world.gen.ChunkProviderServer.func_73153_a(ChunkProviderServer.java:258) at net.minecraft.world.chunk.Chunk.func_76624_a(Chunk.java:1243) at net.minecraft.world.gen.ChunkProviderServer.func_73158_c(ChunkProviderServer.java:153) at net.minecraft.server.management.PlayerInstance.<init>(PlayerInstance.java:51) at net.minecraft.server.management.PlayerManager.getOrCreateChunkWatcher(PlayerManager.java:193) at net.minecraft.server.management.PlayerManager.func_72685_d(PlayerManager.java:370) at net.minecraft.server.management.ServerConfigurationManager.func_72358_d(ServerConfigurationManager.java:282) at net.minecraft.network.NetServerHandler.func_72498_a(NetServerHandler.java:405) at net.minecraft.network.packet.Packet10Flying.func_73279_a(SourceFile:136) at net.minecraft.network.MemoryConnection.func_74428_b(MemoryConnection.java:89) at net.minecraft.network.NetServerHandler.func_72570_d(NetServerHandler.java:141) at net.minecraft.network.NetworkListenThread.func_71747_b(NetworkListenThread.java:54) at net.minecraft.server.integrated.IntegratedServerListenThread.func_71747_b(IntegratedServerListenThread.java:109) at net.minecraft.server.MinecraftServer.func_71190_q(MinecraftServer.java:691) at net.minecraft.server.MinecraftServer.func_71217_p(MinecraftServer.java:587) at net.minecraft.server.integrated.IntegratedServer.func_71217_p(IntegratedServer.java:175) at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:484) at net.minecraft.server.ThreadMinecraftServer.run(SourceFile:583)Caused by: java.lang.ClassNotFoundException: TFC.Entities.AI.AIEatGrass at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:186) at java.lang.ClassLoader.loadClass(Unknown Source) at java.lang.ClassLoader.loadClass(Unknown Source) ... 24 moreCaused by: java.lang.NullPointerException at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:178) ... 26 moreA detailed walkthrough of the error, its code path and all known details is as follows:----------------------------------------------------------------------------------------- System Details --Details: Minecraft Version: 1.6.4 Operating System: Windows 7 (amd64) version 6.1 Java Version: 1.7.0_55, Oracle Corporation Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation Memory: 2579723920 bytes (2460 MB) / 4293918720 bytes (4095 MB) up to 4293918720 bytes (4095 MB) JVM Flags: 3 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xms4G -Xmx4G AABB Pool Size: 1628 (91168 bytes; 0 MB) allocated, 1593 (89208 bytes; 0 MB) used Suspicious classes: FML and Forge are installed IntCache: cache: 0, tcache: 2, allocated: 1, tallocated: 31 FML: MCP v8.11 FML v6.4.49.965 Minecraft Forge 9.11.1.965 Optifine OptiFine_1.6.4_HD_D1 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: 925 (51800 bytes; 0 MB) allocated, 765 (42840 bytes; 0 MB) used Player Count: 1 / 8; [EntityPlayerMP['darthvader456'/153, l='New World', x=516.80, y=161.00, z=-8951.84]] Type: Integrated Server (map_client.txt) Is Modded: Definitely; Client brand changed to 'fml,forge'