I am trying to make a new electricity system and when I try to find the tile entities around my block to determine the length of the wire it gives me an error, heres my code/error

                TileEntity var1 = worldObj.getBlockTileEntity(xCoord+1, yCoord, zCoord);
	TileEntity var2 = worldObj.getBlockTileEntity(xCoord-1, yCoord, zCoord);
	TileEntity var3 = worldObj.getBlockTileEntity(xCoord, yCoord+1, zCoord);
	TileEntity var4 = worldObj.getBlockTileEntity(xCoord, yCoord-1, zCoord);
	TileEntity var5 = worldObj.getBlockTileEntity(xCoord, yCoord, zCoord+1);
	TileEntity var6 = worldObj.getBlockTileEntity(xCoord, yCoord, zCoord-1);

2013-01-06 20:06:30 [iNFO] [sTDERR] java.lang.NullPointerException
2013-01-06 20:06:30 [iNFO] [sTDERR] 	at kore.mods.korecraft.TileEntityWire.findDistance(TileEntityWire.java:68)
2013-01-06 20:06:30 [iNFO] [sTDERR] 	at kore.mods.korecraft.TileEntityWire.<init>(TileEntityWire.java:12)
2013-01-06 20:06:30 [iNFO] [sTDERR] 	at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
2013-01-06 20:06:30 [iNFO] [sTDERR] 	at sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source)
2013-01-06 20:06:30 [iNFO] [sTDERR] 	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source)
2013-01-06 20:06:30 [iNFO] [sTDERR] 	at java.lang.reflect.Constructor.newInstance(Unknown Source)
2013-01-06 20:06:30 [iNFO] [sTDERR] 	at java.lang.Class.newInstance0(Unknown Source)
2013-01-06 20:06:30 [iNFO] [sTDERR] 	at java.lang.Class.newInstance(Unknown Source)
2013-01-06 20:06:30 [iNFO] [sTDERR] 	at net.minecraft.tileentity.TileEntity.createAndLoadEntity(TileEntity.java:138)
2013-01-06 20:06:30 [iNFO] [sTDERR] 	at net.minecraft.world.chunk.storage.AnvilChunkLoader.readChunkFromNBT(AnvilChunkLoader.java:418)
2013-01-06 20:06:30 [iNFO] [sTDERR] 	at net.minecraft.world.chunk.storage.AnvilChunkLoader.checkedReadChunkFromNBT(AnvilChunkLoader.java:103)
2013-01-06 20:06:30 [iNFO] [sTDERR] 	at net.minecraft.world.chunk.storage.AnvilChunkLoader.loadChunk(AnvilChunkLoader.java:83)
2013-01-06 20:06:30 [iNFO] [sTDERR] 	at net.minecraft.world.gen.ChunkProviderServer.safeLoadChunk(ChunkProviderServer.java:182)
2013-01-06 20:06:30 [iNFO] [sTDERR] 	at net.minecraft.world.gen.ChunkProviderServer.loadChunk(ChunkProviderServer.java:118)
2013-01-06 20:06:30 [iNFO] [sTDERR] 	at net.minecraft.server.MinecraftServer.initialWorldChunkLoad(MinecraftServer.java:310)
2013-01-06 20:06:30 [iNFO] [sTDERR] 	at net.minecraft.server.integrated.IntegratedServer.loadAllWorlds(IntegratedServer.java:84)
2013-01-06 20:06:30 [iNFO] [sTDERR] 	at net.minecraft.server.integrated.IntegratedServer.startServer(IntegratedServer.java:100)
2013-01-06 20:06:30 [iNFO] [sTDERR] 	at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:458)
2013-01-06 20:06:30 [iNFO] [sTDERR] 	at net.minecraft.server.ThreadMinecraftServer.run(ThreadMinecraftServer.java:16)
2013-01-06 20:06:30 [iNFO] [sTDOUT] Skipping TileEntity with id tileEntityWire

Alright, I have found that the error is at .getBlockTileEntity, Please Help!

looks like you are using the vars even if "worldObj.getBlockTileEntity(xCoord+1, yCoord, zCoord);" is null ...