Divide by zero exception

[ghost]

Caused when I right click on a crate:

2013-12-26 14:08:42 [INFO] [STDOUT] Time: 12/26/13 2:08 PM
2013-12-26 14:08:42 [INFO] [STDOUT] Description: Ticking memory connection
2013-12-26 14:08:42 [INFO] [STDOUT]
2013-12-26 14:08:42 [INFO] [STDOUT] java.lang.ArithmeticException: / by zero
2013-12-26 14:08:42 [INFO] [STDOUT] at net.mcft.copy.betterstorage.container.ContainerCrate.<init>(ContainerCrate.java:31)
2013-12-26 14:08:42 [INFO] [STDOUT] at net.mcft.copy.betterstorage.block.crate.TileEntityCrate.createContainer(TileEntityCrate.java:201)
2013-12-26 14:08:42 [INFO] [STDOUT] at net.mcft.copy.betterstorage.block.crate.TileEntityCrate.openGui(TileEntityCrate.java:195)
2013-12-26 14:08:42 [INFO] [STDOUT] at net.mcft.copy.betterstorage.block.crate.BlockCrate.func_71903_a(BlockCrate.java:72)
2013-12-26 14:08:42 [INFO] [STDOUT] at net.minecraft.item.ItemInWorldManager.func_73078_a(ItemInWorldManager.java:421)
2013-12-26 14:08:42 [INFO] [STDOUT] at net.minecraft.network.NetServerHandler.func_72472_a(NetServerHandler.java:556)
2013-12-26 14:08:42 [INFO] [STDOUT] at com.sijobe.spc.overwrite.ONetServerHandler.func_72472_a(ONetServerHandler.java:175)
2013-12-26 14:08:42 [INFO] [STDOUT] at net.minecraft.network.packet.Packet15Place.func_73279_a(SourceFile:58)
2013-12-26 14:08:42 [INFO] [STDOUT] at net.minecraft.network.MemoryConnection.func_74428_b(MemoryConnection.java:89)
2013-12-26 14:08:42 [INFO] [STDOUT] at net.minecraft.network.NetServerHandler.func_72570_d(NetServerHandler.java:141)
2013-12-26 14:08:42 [INFO] [STDOUT] at net.minecraft.network.NetworkListenThread.func_71747_b(NetworkListenThread.java:54)
2013-12-26 14:08:42 [INFO] [STDOUT] at net.minecraft.server.integrated.IntegratedServerListenThread.func_71747_b(IntegratedServerListenThread.java:109)
2013-12-26 14:08:42 [INFO] [STDOUT] at net.minecraft.server.MinecraftServer.func_71190_q(MinecraftServer.java:691)
2013-12-26 14:08:42 [INFO] [STDOUT] at net.minecraft.server.MinecraftServer.func_71217_p(MinecraftServer.java:587)
2013-12-26 14:08:42 [INFO] [STDOUT] at net.minecraft.server.integrated.IntegratedServer.func_71217_p(IntegratedServer.java:129)
2013-12-26 14:08:42 [INFO] [STDOUT] at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:484)
2013-12-26 14:08:42 [INFO] [STDOUT] at net.minecraft.server.ThreadMinecraftServer.run(SourceFile:583)
2013-12-26 14:08:42 [INFO] [STDOUT]
2013-12-26 14:08:42 [INFO] [STDOUT]
2013-12-26 14:08:42 [INFO] [STDOUT] A detailed walkthrough of the error, its code path and all known details is as follows:
2013-12-26 14:08:42 [INFO] [STDOUT] ---------------------------------------------------------------------------------------
2013-12-26 14:08:42 [INFO] [STDOUT]
2013-12-26 14:08:42 [INFO] [STDOUT] -- Head --
2013-12-26 14:08:42 [INFO] [STDOUT] Stacktrace:
2013-12-26 14:08:42 [INFO] [STDOUT] at net.mcft.copy.betterstorage.container.ContainerCrate.<init>(ContainerCrate.java:31)
2013-12-26 14:08:42 [INFO] [Minecraft-Server] <PROFILE NAME> left the game
2013-12-26 14:08:42 [INFO] [STDOUT] at net.mcft.copy.betterstorage.block.crate.TileEntityCrate.createContainer(TileEntityCrate.java:201)
2013-12-26 14:08:42 [INFO] [STDOUT] at net.mcft.copy.betterstorage.block.crate.TileEntityCrate.openGui(TileEntityCrate.java:195)
2013-12-26 14:08:42 [INFO] [STDOUT] at net.mcft.copy.betterstorage.block.crate.BlockCrate.func_71903_a(BlockCrate.java:72)
2013-12-26 14:08:42 [INFO] [STDOUT] at net.minecraft.item.ItemInWorldManager.func_73078_a(ItemInWorldManager.java:421)
2013-12-26 14:08:42 [INFO] [STDOUT] at net.minecraft.network.NetServerHandler.func_72472_a(NetServerHandler.java:556)
2013-12-26 14:08:42 [INFO] [STDOUT] at com.sijobe.spc.overwrite.ONetServerHandler.func_72472_a(ONetServerHandler.java:175)
2013-12-26 14:08:42 [INFO] [STDOUT] at net.minecraft.network.packet.Packet15Place.func_73279_a(SourceFile:58)
2013-12-26 14:08:42 [INFO] [STDOUT] at net.minecraft.network.MemoryConnection.func_74428_b(MemoryConnection.java:89)
2013-12-26 14:08:42 [INFO] [STDOUT] at net.minecraft.network.NetServerHandler.func_72570_d(NetServerHandler.java:141)
2013-12-26 14:08:42 [INFO] [STDOUT]
2013-12-26 14:08:42 [INFO] [STDOUT] -- Ticking connection --
2013-12-26 14:08:42 [INFO] [STDOUT] Details:
2013-12-26 14:08:42 [INFO] [STDOUT] Connection: com.sijobe.spc.overwrite.ONetServerHandler@12ce11e8
2013-12-26 14:08:42 [INFO] [STDOUT] Stacktrace:
2013-12-26 14:08:42 [INFO] [STDOUT] at net.minecraft.network.NetworkListenThread.func_71747_b(NetworkListenThread.java:54)
2013-12-26 14:08:42 [INFO] [STDOUT] at net.minecraft.server.integrated.IntegratedServerListenThread.func_71747_b(IntegratedServerListenThread.java:109)
2013-12-26 14:08:42 [INFO] [STDOUT] at net.minecraft.server.MinecraftServer.func_71190_q(MinecraftServer.java:691)
2013-12-26 14:08:42 [INFO] [STDOUT] at net.minecraft.server.MinecraftServer.func_71217_p(MinecraftServer.java:587)
2013-12-26 14:08:42 [INFO] [STDOUT] at net.minecraft.server.integrated.IntegratedServer.func_71217_p(IntegratedServer.java:129)
2013-12-26 14:08:42 [INFO] [STDOUT] at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:484)
2013-12-26 14:08:42 [INFO] [STDOUT] at net.minecraft.server.ThreadMinecraftServer.run(SourceFile:583)
2013-12-26 14:08:42 [INFO] [STDOUT]

[copygirl]

That's an error which has been bugging me for a long time. I will try my best to find what's causing it.
So far I think it will only happen to newly placed crates, so that's good. Any help would be greatly appreciated.

Here's something Thag said on the forum thread:

Some additional info I can provide:
When this happens, no crates will connect to the errant collection of crates, and since the only way to fix them is to destroy them, the contents of the structure are lost. It's happened a couple of times now for me, without them unloading, they just seem fine one moment and bad the next, I'm weary about using them heavily yet though, so I can't say for sure when they break.
[EDIT] Also, the world hangs on shutting down internal server, I suspect this is related

So far I'm guessing it's something to do with the crates not being saved properly, or not marked to be saved. I may have found and fixed the issue already, but I can't say for sure as I never got the error or could reproduce it.
If anyone's got a world where this is happening, mind zipping it up and sending it over to me, along with configs?

[ghost]

My world caused this error, crashed and when I restarted, everything worked fine. So it's not reproducible.