Have you read, understood, and followed all of the rules listed in large text at the top of the support forum? (Yes/No): Yes TFC Version #:79.18.673Forge Version #:10.13.4.1448SSP/SMP (SinglePlayer/MultiPlayer):SMPDescription:Player tries to chop down sequoia from bottom log, server shuts down, as seen.Have you deleted your config files or are using default configs and are still able to reproduce this bug? (Yes/No):YesDo you have any mods other than Forge and TFC installed? (Yes/No):YesIf yes, which mods?FastcraftIf you have Optifine or Cauldron installed, can you still reproduce the bug after uninstalling them? (Yes/No):N/APastebin.com link of the Crash Report: ---- Minecraft Crash Report ---- // Quite honestly, I wouldn't worry myself about that.Time: 6/23/15 7:39 PMDescription: Exception in server tick loopjava.lang.NoClassDefFoundError: net/minecraft/world/World$2at net.minecraft.world.World.func_147460_e(World.java:714)at com.bioxx.tfc.Blocks.Flora.BlockLogNatural.notifyLeaves(BlockLogNatural.java:292)at com.bioxx.tfc.Blocks.Flora.BlockLogNatural.scanLogs(BlockLogNatural.java:277)at com.bioxx.tfc.Blocks.Flora.BlockLogNatural.scanLogs(BlockLogNatural.java:263)at com.bioxx.tfc.Blocks.Flora.BlockLogNatural.scanLogs(BlockLogNatural.java:263)at com.bioxx.tfc.Blocks.Flora.BlockLogNatural.scanLogs(BlockLogNatural.java:263)at com.bioxx.tfc.Blocks.Flora.BlockLogNatural.scanLogs(BlockLogNatural.java:263)at com.bioxx.tfc.Blocks.Flora.BlockLogNatural.scanLogs(BlockLogNatural.java:263)at com.bioxx.tfc.Blocks.Flora.BlockLogNatural.scanLogs(BlockLogNatural.java:263)at com.bioxx.tfc.Blocks.Flora.BlockLogNatural.scanLogs(BlockLogNatural.java:263)at com.bioxx.tfc.Blocks.Flora.BlockLogNatural.scanLogs(BlockLogNatural.java:263)at com.bioxx.tfc.Blocks.Flora.BlockLogNatural.scanLogs(BlockLogNatural.java:263)at com.bioxx.tfc.Blocks.Flora.BlockLogNatural.scanLogs(BlockLogNatural.java:263)at com.bioxx.tfc.Blocks.Flora.BlockLogNatural.ProcessTree(BlockLogNatural.java:212)at com.bioxx.tfc.Blocks.Flora.BlockLogNatural.func_149636_a(BlockLogNatural.java:156)at com.bioxx.tfc.Blocks.Flora.BlockLogNatural.func_149681_a(BlockLogNatural.java:181)at net.minecraft.server.management.ItemInWorldManager.removeBlock(ItemInWorldManager.java:246)at net.minecraft.server.management.ItemInWorldManager.func_73084_b(ItemInWorldManager.java:296)at net.minecraft.server.management.ItemInWorldManager.func_73082_a(ItemInWorldManager.java:217)at net.minecraft.network.NetHandlerPlayServer.func_147345_a(NetHandlerPlayServer.java:498)at net.minecraft.network.play.client.C07PacketPlayerDigging.func_148833_a(SourceFile:53)at net.minecraft.network.play.client.C07PacketPlayerDigging.func_148833_a(SourceFile:8)at net.minecraft.network.NetworkManager.func_74428_b(NetworkManager.java:212)at net.minecraft.network.NetworkSystem.func_151269_c(NetworkSystem.java:165)at net.minecraft.server.MinecraftServer.func_71190_q(MinecraftServer.java:659)at net.minecraft.server.dedicated.DedicatedServer.func_71190_q(DedicatedServer.java:334)at net.minecraft.server.MinecraftServer.func_71217_p(MinecraftServer.java:547)at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:427)at net.minecraft.server.MinecraftServer$2.run(MinecraftServer.java:685)A detailed walkthrough of the error, its code path and all known details is as follows:----------------------------------------------------------------------------------------- System Details --Details:Minecraft Version: 1.7.10Operating System: Linux (amd64) version 2.6.32-504.8.1.el6.x86_64Java Version: 1.7.0_75, Oracle CorporationJava VM Version: Java HotSpot 64-Bit Server VM (mixed mode), Oracle CorporationMemory: 784834000 bytes (748 MB) / 1037959168 bytes (989 MB) up to 1037959168 bytes (989 MB)JVM Flags: 10 total; -Xincgc -XX:+UseConcMarkSweepGC -XX:+UseParNewGC -XX:+CMSIncrementalPacing -XX:PermSize=64m -XX:MaxPermSize=512m -Xmx1024M -Xms1024M -XX:+CMSClassUnloadingEnabled -XX:+CMSClassUnloadingEnabledAABB Pool Size: 0 (0 bytes; 0 MB) allocated, 0 (0 bytes; 0 MB) usedIntCache: cache: 0, tcache: 15, allocated: 0, tallocated: 0FML: MCP v9.05 FML v7.10.85.1291 6 mods loaded, 6 mods activemcp{9.05} [Minecraft Coder Pack] (minecraft.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->AvailableFML{7.10.85.1291} [Forge Mod Loader] (forge-1.7.10-recommended.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->AvailableForge{10.13.2.1291} [Minecraft Forge] (forge-1.7.10-recommended.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Availabletfc_coremod{0.79.18} [TFC[coremod]] (minecraft.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Availableterrafirmacraft{0.79.18} [TerraFirmaCraft] ([1.7.10]TerraFirmaCraft-0.79.18.673.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->AvailableFastCraft{1.21} [FastCraft] (fastcraft-1.21.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->AvailableProfiler Position: N/A (disabled)Vec3 Pool Size: 0 (0 bytes; 0 MB) allocated, 0 (0 bytes; 0 MB) usedPlayer Count: 1 / 10; [EntityPlayerMP['Captain_Glac1er'/223, l='TFC', x=-65.89, y=148.00, z=-9624.19]]Is Modded: Definitely; Server brand changed to 'fml,forge'Type: Dedicated Server (map_server.txt)