java.lang.NullPointerException: Ticking block entity
    at net.minecraft.tileentity.TileEntity.func_145832_p(TileEntity.java:130)
    at pl.asie.charset.pipes.TileShifter.getDirection(TileShifter.java:27)
    at pl.asie.charset.pipes.BlockShifter.func_176221_a(BlockShifter.java:56)
    at net.minecraft.block.Block.isSideSolid(Block.java:1105)
    at pl.asie.charset.wires.WireUtils.canPlaceWire(WireUtils.java:301)
    at pl.asie.charset.wires.logic.PartWireBase.onNeighborBlockChange(PartWireBase.java:157)
    at pl.asie.charset.wires.logic.PartWireBase.pokeExtendedNeighbors(PartWireBase.java:398)
    at pl.asie.charset.wires.logic.PartWireBase.func_73660_a(PartWireBase.java:431)
    at mcmultipart.block.TileMultipart.func_73660_a(TileMultipart.java:152)
    at net.minecraft.world.World.func_72939_s(World.java:1716)
    at net.minecraft.client.Minecraft.func_71407_l(Minecraft.java:2089)
    at net.minecraft.client.Minecraft.func_71411_J(Minecraft.java:1024)
    at net.minecraft.client.Minecraft.func_99999_d(Minecraft.java:349)
    at net.minecraft.client.main.Main.main(SourceFile:124)
    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 net.minecraft.launchwrapper.Launch.launch(Launch.java:135)
    at net.minecraft.launchwrapper.Launch.main(Launch.java:28)