Hi, it seems my server crashes when terraincontrol trys to populate my world with structures

java.lang.NullPointerException
at net.minecraft.server.v1_4_R1.Chunk.a(Chunk.java:433)
at com.khorn.terraincontrol.bukkit.BukkitWorld.setBlock(BukkitWorld.java:401)
at com.khorn.terraincontrol.customobjects.CustomObjectGen.GenerateCustomObject(CustomObjectGen.java:167)
at com.khorn.terraincontrol.customobjects.CustomObjectGen.Process(CustomObjectGen.java:71)
at com.khorn.terraincontrol.generator.ObjectSpawner.populate(ObjectSpawner.java:48)
at com.khorn.terraincontrol.bukkit.TCBlockPopulator.populate(TCBlockPopulator.java:27)
at net.minecraft.server.v1_4_R1.ChunkProviderServer.getChunkAt(ChunkProviderServer.java:239)
at net.minecraft.server.v1_4_R1.Chunk.a(Chunk.java:797)
at org.bukkit.craftbukkit.v1_4_R1.chunkio.ChunkIOProvider.callStage2(ChunkIOProvider.java:61)
at org.bukkit.craftbukkit.v1_4_R1.chunkio.ChunkIOProvider.callStage2(ChunkIOProvider.java:13)
at org.bukkit.craftbukkit.v1_4_R1.util.AsynchronousExecutor$Task.finish(AsynchronousExecutor.java:179)
at org.bukkit.craftbukkit.v1_4_R1.util.AsynchronousExecutor.finishActive(AsynchronousExecutor.java:287)
at org.bukkit.craftbukkit.v1_4_R1.chunkio.ChunkIOExecutor.tick(ChunkIOExecutor.java:30)
at net.minecraft.server.v1_4_R1.MinecraftServer.r(MinecraftServer.java:537)
at net.minecraft.server.v1_4_R1.DedicatedServer.r(DedicatedServer.java:224)
at net.minecraft.server.v1_4_R1.MinecraftServer.q(MinecraftServer.java:494)
at net.minecraft.server.v1_4_R1.MinecraftServer.run(MinecraftServer.java:427)
at net.minecraft.server.v1_4_R1.ThreadServerApplication.run(SourceFile:849)

Does this crash always happen or just sometimes? Does it still crash when using this build? (That build is up to date with the latest changes in the source code.)

After using the build you have suggested, i have not experienced any crashes so far, so i assume that has fixed the problem. Thanks for the help

You're welcome.