scanLogs

2013-02-02 21:53:06 [SEVERE] Encountered an unexpected exception NoClassDefFoundError
java.lang.NoClassDefFoundError: l
	at a.<init>(CrashReport.java:27)
	at a.a(CrashReport.java:319)
	at yc.m(World.java:826)
	at yc.h(World.java:801)
	at yc.f(World.java:744)
	at yc.e(World.java:702)
	at TFC.Blocks.BlockLogNatural.scanLogs(BlockLogNatural.java:282)
	at TFC.Blocks.BlockLogNatural.scanLogs(BlockLogNatural.java:269)
	at TFC.Blocks.BlockLogNatural.scanLogs(BlockLogNatural.java:269)
	at TFC.Blocks.BlockLogNatural.scanLogs(BlockLogNatural.java:269)
	at TFC.Blocks.BlockLogNatural.scanLogs(BlockLogNatural.java:269)
	at TFC.Blocks.BlockLogNatural.scanLogs(BlockLogNatural.java:269)
	at TFC.Blocks.BlockLogNatural.scanLogs(BlockLogNatural.java:269)
	at TFC.Blocks.BlockLogNatural.scanLogs(BlockLogNatural.java:269)
	at TFC.Blocks.BlockLogNatural.scanLogs(BlockLogNatural.java:269)
	at TFC.Blocks.BlockLogNatural.scanLogs(BlockLogNatural.java:269)
	at TFC.Blocks.BlockLogNatural.ProcessTree(BlockLogNatural.java:215)
	at TFC.Blocks.BlockLogNatural.a(BlockLogNatural.java:156)
	at ir.b(ItemInWorldManager.java:333)
	at ir.a(ItemInWorldManager.java:237)
	at iv.a(NetServerHandler.java:525)
	at ei.a(SourceFile:46)
	at cg.b(TcpConnection.java:454)
	at iv.d(NetServerHandler.java:137)
	at iw.b(NetworkListenThread.java:57)
	at ht.b(SourceFile:30)
	at net.minecraft.server.MinecraftServer.r(MinecraftServer.java:702)
	at ho.r(DedicatedServer.java:270)
	at net.minecraft.server.MinecraftServer.q(MinecraftServer.java:598)
	at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:497)
	at fy.run(SourceFile:849)