Bonjour , hier je jouais à minecraft avec les mods Industrial craft , buildcraft , forestry , craft guide et j'ai mon jeu qui à crash et sa ma marqué :
Time: 29/06/14 11:46
Description: Exception in server tick loop
java.lang.NoClassDefFoundError: org/ejml/data/Matrix64F
at ic2.core.energy.EnergyNetLocal.addTileToGrids(Ener
gyNetLocal.java:398)
at ic2.core.energy.EnergyNetLocal.addTileEntity(Energ
yNetLocal.java:141)
at ic2.core.energy.EnergyNetLocal.addTileEntity(Energ
yNetLocal.java:57)
at ic2.core.energy.EventHandler.onEnergyTileLoad(Even
tHandler.java:27)
at cpw.mods.fml.common.eventhandler.ASMEventHandler_3
7_EventHandler_onEnergyTileLoad_EnergyTileLoadEven
t.invoke(.dynamic)
at cpw.mods.fml.common.eventhandler.ASMEventHandler.i
nvoke(ASMEventHandler.java:51)
at cpw.mods.fml.common.eventhandler.EventBus.post(Eve
ntBus.java:122)
at ic2.core.block.wiring.TileEntityCable.onLoaded(Til
eEntityCable.java:166)
at ic2.core.block.TileEntityBlock$1.tickCallback(Tile
EntityBlock.java:53)
at ic2.core.TickHandler.processTickCallbacks(TickHand
ler.java:137)
at ic2.core.TickHandler.onWorldTick(TickHandler.java:
32)
at cpw.mods.fml.common.eventhandler.ASMEventHandler_1
7_TickHandler_onWorldTick_WorldTickEvent.invoke(.d
ynamic)
at cpw.mods.fml.common.eventhandler.ASMEventHandler.i
nvoke(ASMEventHandler.java:51)
at cpw.mods.fml.common.eventhandler.EventBus.post(Eve
ntBus.java:122)
at cpw.mods.fml.common.FMLCommonHandler.onPreWorldTic
k(FMLCommonHandler.java:268)
at net.minecraft.server.MinecraftServer.func_71190_q(
MinecraftServer.java:604)
at net.minecraft.server.MinecraftServer.func_71217_p(
MinecraftServer.java:531)
at net.minecraft.server.integrated.IntegratedServer.f
unc_71217_p(IntegratedServer.java:111)
at net.minecraft.server.MinecraftServer.run(Minecraft
Server.java:414)
at net.minecraft.server.MinecraftServer$2.run(Minecra
ftServer.java:669)
Caused by: java.lang.ClassNotFoundException: org.ejml.data.Matrix64F
at net.minecraft.launchwrapper.LaunchClassLoader.find
Class(LaunchClassLoader.java:188)
at java.lang.ClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
... 20 more
Caused by: java.lang.NullPointerException
A detailed walkthrough of the error, its code path and all known details is as follows:
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Merci de me répondre 
