I have the same problem

---- Minecraft Crash Report ----

// Oops.

 

Time: 12/1/13 3:50 PM

Description: There was a severe problem during mod loading that has caused the game to fail

 

cpw.mods.fml.common.LoaderException: java.lang.ClassNotFoundException: JinRyuu.FamilyC.mod_FamilyC

at cpw.mods.fml.common.LoadController.transition(LoadController.java:156)

at cpw.mods.fml.common.Loader.loadMods(Loader.java:521)

at cpw.mods.fml.client.FMLClientHandler.beginMinecraftLoading(FMLClientHandler.java:183)

at net.minecraft.client.Minecraft.func_71384_a(Minecraft.java:473)

at net.minecraft.client.Minecraft.func_99999_d(Minecraft.java:808)

at net.minecraft.client.main.Main.main(SourceFile:101)

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)

Caused by: java.lang.ClassNotFoundException: JinRyuu.FamilyC.mod_FamilyC

at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:186)

at java.lang.ClassLoader.loadClass(Unknown Source)

at java.lang.ClassLoader.loadClass(Unknown Source)

at cpw.mods.fml.common.ModClassLoader.loadClass(ModClassLoader.java:61)

at java.lang.Class.forName0(Native Method)

at java.lang.Class.forName(Unknown Source)

at cpw.mods.fml.common.FMLModContainer.constructMod(FMLModContainer.java:462)

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:74)

at com.google.common.eventbus.SynchronizedEventHandler.handleEvent(SynchronizedEventHandler.java:45)

at com.google.common.eventbus.EventBus.dispatch(EventBus.java:313)

at com.google.common.eventbus.EventBus.dispatchQueuedEvents(EventBus.java:296)

at com.google.common.eventbus.EventBus.post(EventBus.java:267)

at cpw.mods.fml.common.LoadController.sendEventToModContainer(LoadController.java:201)

at cpw.mods.fml.common.LoadController.propogateStateMessage(LoadController.java:181)

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:74)

at com.google.common.eventbus.SynchronizedEventHandler.handleEvent(SynchronizedEventHandler.java:45)

at com.google.common.eventbus.EventBus.dispatch(EventBus.java:313)

at com.google.common.eventbus.EventBus.dispatchQueuedEvents(EventBus.java:296)

at com.google.common.eventbus.EventBus.post(EventBus.java:267)

at cpw.mods.fml.common.LoadController.distributeStateMessage(LoadController.java:112)

at cpw.mods.fml.common.Loader.loadMods(Loader.java:511)

... 10 more

Caused by: java.lang.NullPointerException

at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:178)

... 38 more

 

 

A 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_01, Oracle Corporation

Java VM Version: Java HotSpot 64-Bit Server VM (mixed mode), Oracle Corporation

Memory: 299140144 bytes (285 MB) / 438239232 bytes (417 MB) up to 954466304 bytes (910 MB)

JVM Flags: 2 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx1G

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 v8.11 FML v6.4.45.953 Minecraft Forge 9.11.1.953 16 mods loaded, 16 mods active

mcp{8.09} [Minecraft Coder Pack] (minecraft.jar) Unloaded->Constructed

FML{6.4.45.953} [Forge Mod Loader] (minecraftforge-9.11.1.953.jar) Unloaded->Constructed

Forge{9.11.1.953} [Minecraft Forge] (minecraftforge-9.11.1.953.jar) Unloaded->Constructed

TooManyItems{1.6.4} [TooManyItems] (minecraft.jar) Unloaded->Constructed

MCMO{beta 0.1} [Minecraft Menu Overlay] (%5B1.6.4%5DMinecraft Menu Overlay - beta 0.2.zip) Unloaded->Constructed

battlegear2{1.0.3.4} [Mine & Blade Battlegear 2 - Warcry] (1.6.4-MB_Battlegear2-Warcry-1.0.3.4.jar) Unloaded->Constructed

iChunUtil{2.3.0} [iChunUtil] (iChunUtil2.3.0.zip) Unloaded->Constructed

BackTools{2.0.0} [backTools] (BackTools2.0.0.zip) Unloaded->Constructed

customnpcs{0.8} [CustomNpcs] (CustomNPCs_1.6.2.zip) Unloaded->Constructed

GraviGun{2.0.0} [GraviGun] (GravityGun2.0.0.zip) Unloaded->Constructed

Hats{2.0.2} [Hats] (Hats2.0.2.zip) Unloaded->Constructed

JinRyuu_FamilyC{1.0.2} [JinRyuu's FamilyC] (JinRyuu) Unloaded->Errored

JinRyuu_BetterRenderAddon{1.3.2} [JinRyuu's Better Render Addon] (JinRyuu) Unloaded->Errored

kk{0.5.2.1.6.4 Beta} [Kingdom keys] (KingdomKeys-0.5.2.1.6.4-62.jar) Unloaded->Constructed

MinecraftMadness{MC 1.6.4} [Minecraft Madness] (MinecraftMadness-164.zip) Unloaded->Constructed

PortalGun{2.0.1} [PortalGun] (PortalGun2.0.1.zip) Unloaded->Constructed

FamilyCraft problem.