I have spent the last hour trying to figure this out... But i have no idea what it is.
The server had been running for a while, so i restarted it. But when it was loading the world it crashed.
07:29:57 [SEVERE] Encountered an unexpected exception NoClassDefFoundError
07:29:57 java.lang.NoClassDefFoundError: net/minecraft/util/ReportedException
07:29:57 at net.minecraft.crash.CrashReport.func_85055_a(CrashReport.java:313)
07:29:57 at net.minecraft.world.World.func_72798_a(World.java:418)
07:29:57 at net.minecraft.tileentity.TileEntity.func_70311_o(TileEntity.java:223)
07:29:57 at ic2.core.EnergyNet.addTileEntity(EnergyNet.java:176)
07:29:57 at ic2.core.EnergyNet$EventHandler.onEnergyTileLoad(EnergyNet.java:52)
07:29:57 at net.minecraftforge.event.ASMEventHandler_28_EventHandler_onEnergyTileLoad_EnergyTileLoadEvent.invoke(.dynamic)
07:29:57 at net.minecraftforge.event.ASMEventHandler.invoke(ASMEventHandler.java:39)
07:29:57 at net.minecraftforge.event.EventBus.post(EventBus.java:108)
07:29:57 at advsolar.TileEntitySolarPanel.onLoaded(TileEntitySolarPanel.java:103)
07:29:57 at advsolar.TileEntitySolarPanel.func_70312_q(TileEntitySolarPanel.java:84)
07:29:57 at net.minecraft.world.chunk.Chunk.func_76604_a(Chunk.java:1040)
07:29:57 at net.minecraft.world.chunk.Chunk.func_76620_a(Chunk.java:1013)
07:29:57 at net.minecraft.world.chunk.storage.AnvilChunkLoader.func_75823_a(AnvilChunkLoader.java:442)
07:29:57 at net.minecraft.world.chunk.storage.AnvilChunkLoader.func_75822_a(AnvilChunkLoader.java:103)
07:29:57 at net.minecraft.world.chunk.storage.AnvilChunkLoader.func_75815_a(AnvilChunkLoader.java:83)
07:29:57 at net.minecraft.world.gen.ChunkProviderServer.func_73239_e(ChunkProviderServer.java:182)
07:29:57 at net.minecraft.world.gen.ChunkProviderServer.func_73158_c(ChunkProviderServer.java:118)
07:29:57 at net.minecraft.server.MinecraftServer.func_71222_d(MinecraftServer.java:282)
07:29:57 at net.minecraft.server.MinecraftServer.func_71247_a(MinecraftServer.java:256)
07:29:57 at net.minecraft.server.dedicated.DedicatedServer.func_71197_b(DedicatedServer.java:186)
07:29:57 at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:431)
07:29:57 at net.minecraft.server.ThreadMinecraftServer.run(SourceFile:573)
The server had been running for a while, so i restarted it. But when it was loading the world it crashed.
07:29:57 [SEVERE] Encountered an unexpected exception NoClassDefFoundError
07:29:57 java.lang.NoClassDefFoundError: net/minecraft/util/ReportedException
07:29:57 at net.minecraft.crash.CrashReport.func_85055_a(CrashReport.java:313)
07:29:57 at net.minecraft.world.World.func_72798_a(World.java:418)
07:29:57 at net.minecraft.tileentity.TileEntity.func_70311_o(TileEntity.java:223)
07:29:57 at ic2.core.EnergyNet.addTileEntity(EnergyNet.java:176)
07:29:57 at ic2.core.EnergyNet$EventHandler.onEnergyTileLoad(EnergyNet.java:52)
07:29:57 at net.minecraftforge.event.ASMEventHandler_28_EventHandler_onEnergyTileLoad_EnergyTileLoadEvent.invoke(.dynamic)
07:29:57 at net.minecraftforge.event.ASMEventHandler.invoke(ASMEventHandler.java:39)
07:29:57 at net.minecraftforge.event.EventBus.post(EventBus.java:108)
07:29:57 at advsolar.TileEntitySolarPanel.onLoaded(TileEntitySolarPanel.java:103)
07:29:57 at advsolar.TileEntitySolarPanel.func_70312_q(TileEntitySolarPanel.java:84)
07:29:57 at net.minecraft.world.chunk.Chunk.func_76604_a(Chunk.java:1040)
07:29:57 at net.minecraft.world.chunk.Chunk.func_76620_a(Chunk.java:1013)
07:29:57 at net.minecraft.world.chunk.storage.AnvilChunkLoader.func_75823_a(AnvilChunkLoader.java:442)
07:29:57 at net.minecraft.world.chunk.storage.AnvilChunkLoader.func_75822_a(AnvilChunkLoader.java:103)
07:29:57 at net.minecraft.world.chunk.storage.AnvilChunkLoader.func_75815_a(AnvilChunkLoader.java:83)
07:29:57 at net.minecraft.world.gen.ChunkProviderServer.func_73239_e(ChunkProviderServer.java:182)
07:29:57 at net.minecraft.world.gen.ChunkProviderServer.func_73158_c(ChunkProviderServer.java:118)
07:29:57 at net.minecraft.server.MinecraftServer.func_71222_d(MinecraftServer.java:282)
07:29:57 at net.minecraft.server.MinecraftServer.func_71247_a(MinecraftServer.java:256)
07:29:57 at net.minecraft.server.dedicated.DedicatedServer.func_71197_b(DedicatedServer.java:186)
07:29:57 at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:431)
07:29:57 at net.minecraft.server.ThreadMinecraftServer.run(SourceFile:573)