Chicken Core CRASH

2013-12-27 21:36:21 [SEVERE] [ForgeModLoader] Caught exception from Natura
java.lang.NoClassDefFoundError: codechicken/nei/recipe/RecipeInfo
        at codechicken.nei.api.API.registerGuiOverlay(API.java:89)
        at codechicken.nei.api.API.registerGuiOverlay(API.java:77)
        at codechicken.nei.api.API.registerGuiOverlay(API.java:64)
        at mods.natura.client.NProxyClient.registerRenderer(NProxyClient.java:60
)
        at mods.natura.Natura.init(Natura.java:75)
        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(FMLModContain
er.java:494)
        at sun.reflect.GeneratedMethodAccessor3.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(Synch
ronizedEventHandler.java:45)
        at com.google.common.eventbus.EventBus.dispatch(EventBus.java:314)
        at com.google.common.eventbus.EventBus.dispatchQueuedEvents(EventBus.jav
a:296)
        at com.google.common.eventbus.EventBus.post(EventBus.java:267)
        at cpw.mods.fml.common.LoadController.sendEventToModContainer(LoadContro
ller.java:192)
        at cpw.mods.fml.common.LoadController.propogateStateMessage(LoadControll
er.java:172)
        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(Synch
ronizedEventHandler.java:45)
        at com.google.common.eventbus.EventBus.dispatch(EventBus.java:314)
        at com.google.common.eventbus.EventBus.dispatchQueuedEvents(EventBus.jav
a:296)
        at com.google.common.eventbus.EventBus.post(EventBus.java:267)
        at cpw.mods.fml.common.LoadController.distributeStateMessage(LoadControl
ler.java:103)
        at cpw.mods.fml.common.Loader.initializeMods(Loader.java:691)
        at cpw.mods.fml.client.FMLClientHandler.finishMinecraftLoading(FMLClient
Handler.java:213)
        at net.minecraft.client.Minecraft.func_71384_a(Minecraft.java:448)
        at net.minecraft.client.MinecraftAppletImpl.func_71384_a(SourceFile:56)
        at net.minecraft.client.Minecraft.run(Minecraft.java:733)
        at java.lang.Thread.run(Unknown Source)
Caused by: java.lang.ClassNotFoundException: codechicken.nei.recipe.RecipeInfo
        at cpw.mods.fml.relauncher.RelaunchClassLoader.findClass(RelaunchClassLo
ader.java:238)
        at java.lang.ClassLoader.loadClass(Unknown Source)
        at java.lang.ClassLoader.loadClass(Unknown Source)
        ... 36 more
Caused by: java.lang.NullPointerException
        at org.objectweb.asm.ClassReader.<init>(Unknown Source)
        at miscperipherals.asm.ImplementIfLoadedTransformer.transform(ImplementI
fLoadedTransformer.java:19)
        at cpw.mods.fml.relauncher.RelaunchClassLoader.runTransformers(RelaunchC
lassLoader.java:352)
        at cpw.mods.fml.relauncher.RelaunchClassLoader.findClass(RelaunchClassLo
ader.java:225)
        ... 38 more