Heres the error report: Minecraft has crashed! ---------------------- Minecraft has stopped running because it encountered a problem; Failed to start game A full error report has been saved to C:\Users\owner\AppData\Roaming\.minecraft\crash-reports\crash-2013-02-20_22.05.58-client.txt - Please include a copy of that file (Not this screen!) if you report this crash to anyone; without it, they will not be able to help fix the crash --- BEGIN ERROR REPORT 41e8af71 -------- Full report at: C:\Users\owner\AppData\Roaming\.minecraft\crash-reports\crash-2013-02-20_22.05.58-client.txt Please show that file to Mojang, NOT just this screen! Generated 2/20/13 10:05 PM -- System Details -- Details: Minecraft Version: 1.4.6 Operating System: Windows 7 (amd64) version 6.1 Java Version: 1.6.0_24, Sun Microsystems Inc. Java VM Version: Java HotSpot 64-Bit Server VM (mixed mode), Sun Microsystems Inc. Memory: 345471152 bytes (329 MB) / 519110656 bytes (495 MB) up to 1037959168 bytes (989 MB) JVM Flags: 2 total; -Xms512m -Xmx1024m AABB Pool Size: 0 (0 bytes; 0 MB) allocated, 0 (0 bytes; 0 MB) used Suspicious classes: FML and Forge are installed IntCache: cache: 0, tcache: 0, allocated: 0, tallocated: 0 FML: MCP v7.25 FML v4.6.15.514 Minecraft Forge 6.5.0.486 4 mods loaded, 4 mods active mcp [Minecraft Coder Pack] (minecraft.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized FML [Forge Mod Loader] (coremods) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized Forge [Minecraft Forge] (coremods) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized TerraFirmaCraft [TerraFirmaCraft] (minecraft.jar) Unloaded->Constructed->Pre-initialized->Initialized->Errored LWJGL: 2.4.2 OpenGL: Mobile Intel® 4 Series Express Chipset Family GL version 2.1.0 - Build 8.15.10.2086, Intel 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: ~~ERROR~~ NullPointerException: null cpw.mods.fml.common.LoaderException: java.lang.NoClassDefFoundError: TFC/Core/Player/TFC_PlayerServer at cpw.mods.fml.common.LoadController.transition(LoadController.java:117) at cpw.mods.fml.common.Loader.initializeMods(Loader.java:660) at cpw.mods.fml.client.FMLClientHandler.finishMinecraftLoading(FMLClientHandler.java:207) at net.minecraft.client.Minecraft.a(Minecraft.java:456) at asq.a(SourceFile:56) at net.minecraft.client.Minecraft.run(Minecraft.java:744) at java.lang.Thread.run(Unknown Source) Caused by: java.lang.NoClassDefFoundError: TFC/Core/Player/TFC_PlayerServer at TFC.CommonProxy.RegisterPlayerApiClasses(CommonProxy.java:254) at TFC.ClientProxy.RegisterPlayerApiClasses(ClientProxy.java:183) at TFC.TerraFirmaCraft.modsLoaded(TerraFirmaCraft.java:199) 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 cpw.mods.fml.common.FMLModContainer.handleModStateEvent(FMLModContainer.java:483) 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 com.google.common.eventbus.EventHandler.handleEvent(EventHandler.java:69) at com.google.common.eventbus.SynchronizedEventHandler.handleEvent(SynchronizedEventHandler.java:45) at com.google.common.eventbus.EventBus.dispatch(EventBus.java:317) at com.google.common.eventbus.EventBus.dispatchQueuedEvents(EventBus.java:300) at com.google.common.eventbus.EventBus.post(EventBus.java:268) at cpw.mods.fml.common.LoadController.propogateStateMessage(LoadController.java:140) 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 com.google.common.eventbus.EventHandler.handleEvent(EventHandler.java:69) at com.google.common.eventbus.SynchronizedEventHandler.handleEvent(SynchronizedEventHandler.java:45) at com.google.common.eventbus.EventBus.dispatch(EventBus.java:317) at com.google.common.eventbus.EventBus.dispatchQueuedEvents(EventBus.java:300) at com.google.common.eventbus.EventBus.post(EventBus.java:268) at cpw.mods.fml.common.LoadController.distributeStateMessage(LoadController.java:83) at cpw.mods.fml.common.Loader.initializeMods(Loader.java:659) ... 5 more Caused by: java.lang.ClassNotFoundException: TFC.Core.Player.TFC_PlayerServer at cpw.mods.fml.relauncher.RelaunchClassLoader.findClass(RelaunchClassLoader.java:179) at java.lang.ClassLoader.loadClass(Unknown Source) at java.lang.ClassLoader.loadClass(Unknown Source) ... 34 more Caused by: java.lang.NoClassDefFoundError: ServerPlayerBase at java.lang.ClassLoader.defineClass1(Native Method) at java.lang.ClassLoader.defineClassCond(Unknown Source) at java.lang.ClassLoader.defineClass(Unknown Source) at java.security.SecureClassLoader.defineClass(Unknown Source) at cpw.mods.fml.relauncher.RelaunchClassLoader.findClass(RelaunchClassLoader.java:172) ... 36 more Caused by: java.lang.ClassNotFoundException: ServerPlayerBase at cpw.mods.fml.relauncher.RelaunchClassLoader.findClass(RelaunchClassLoader.java:87) at java.lang.ClassLoader.loadClass(Unknown Source) at java.lang.ClassLoader.loadClass(Unknown Source) ... 41 more --- END ERROR REPORT 3705d057 ---------- Plz