Server null pointer error then refuses connections

[vanwed94]

Title: Server null pointer error then refuses connections

Version: 2.1.1

OS: Windows 7 64-bit

Java Version: Java Version 1.6.0_31

Description of Problem:

When I start up the server it goes through all the normal start up things boots up the plugins then it gives me this null pointer error and prevents anyone from connecting even my computer(Host Computer). Any help or advice is helpful.

Error Messages:

Error Log:

01:16 PM [sEVERE] java.lang.NullPointerException 

01:16 PM [sEVERE] at net.minecraft.server.ItemStack.doMaterialsMatch(ItemStack.java:243) 

01:16 PM [sEVERE] at ee.TileCondenser.extractItem(TileCondenser.java:539) 

01:16 PM [sEVERE] at buildcraft.transport.pipes.PipeItemsWood.checkExtract(PipeItemsWood.java:111) 

01:16 PM [sEVERE] at buildcraft.transport.pipes.PipeItemsWood.doWork(PipeItemsWood.java:90) 

01:16 PM [sEVERE] at buildcraft.transport.TileGenericPipe.doWork(TileGenericPipe.java:159) 

01:16 PM [sEVERE] at buildcraft.api.PowerProvider.update(PowerProvider.java:52) 

01:16 PM [sEVERE] at buildcraft.transport.TileGenericPipe.l_(TileGenericPipe.java:108) 

01:16 PM [sEVERE] at net.minecraft.server.World.tickEntities(World.java:1182) 

01:16 PM [sEVERE] at net.minecraft.server.MinecraftServer.w(MinecraftServer.java:534) 

01:16 PM [sEVERE] at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:441) 

01:16 PM [sEVERE] at net.minecraft.server.ThreadServerApplication.run(SourceFile:465) 

01:16 PM [sEVERE] Unexpected exception 

01:16 PM [iNFO] Read timed out

[Torezu]

This is a very common problem. Someone tried to extract items from an Energy Condenser with a wooden pipe. Use MCEdit to remove the pipe, then apply the fix (hanging around the forums somewhere, it's been a while since this has popped up) or just tell everyone not to do that any more.

You may want to just upgrade your server version, at some point. It'll probably mean a world restart or some time in MCEdit to copy stuff over, but...

[vanwed94]

Thanks, Torezu for the info, is there someway to stop this from happening or will it all ways do this when someone places the pipe.

[Torezu]

Must I do everything for you? Less than a minute with the search bar.