java.lang.NullPointerException
        at ic2.common.TileEntityCable.changeFoam(TileEntityCable.java:158)
        at ic2.common.TileEntityCable.a(TileEntityCable.java:68)
        at qj.c(TileEntity.java:110)
        at vr.a(AnvilChunkLoader.java:364)
        at vr.a(AnvilChunkLoader.java:82)
        at vr.a(AnvilChunkLoader.java:65)
        at mp.e(ChunkProviderServer.java:150)
        at mp.c(ChunkProviderServer.java:101)
        at net.minecraft.server.MinecraftServer.a(MinecraftServer.java:328)
        at net.minecraft.server.MinecraftServer.s(MinecraftServer.java:245)
        at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:411)
        at dn.run(SourceFile:492)