I made an infinite geothermal generator on my server using an energy condenser and piping.
Whenever I try to start it up, I get this error report.
012-03-02 20:30:01 [sEVERE] Unexpected exception
java.lang.NullPointerException
at net.minecraft.server.ItemStack.doMaterialsMatch(ItemStack.java:243)
at ee.TileCondenser.extractItem(TileCondenser.java:539)
at buildcraft.transport.pipes.PipeItemsWood.checkExtract(PipeItemsWood.java:111)
at buildcraft.transport.pipes.PipeItemsWood.doWork(PipeItemsWood.java:90)
at buildcraft.transport.TileGenericPipe.doWork(TileGenericPipe.java:159)
at buildcraft.api.PowerProvider.update(PowerProvider.java:52)
at buildcraft.transport.TileGenericPipe.l_(TileGenericPipe.java:108)
at net.minecraft.server.World.tickEntities(World.java:1182)
at net.minecraft.server.MinecraftServer.w(MinecraftServer.java:534)
at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:441)
at net.minecraft.server.ThreadServerApplication.run(SourceFile:465)
I can tell it's a problem with the piping.
It's a small server I play with friends, so I don't have any good backups, and they'd be really annoyed if the world completely broke.
Is there any way I can make the world file work again?