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java.lang.ArrayIndexOutOfBoundsException: -128	at org.bukkit.Material.getMaterial(Material.java:451)	at com.tommytony.war.mapper.ZoneVolumeMapper.load(ZoneVolumeMapper.java:208)	at com.tommytony.war.volume.ZoneVolume.resetBlocks(ZoneVolume.java:50)	at com.tommytony.war.command.SaveZoneCommand.handle(SaveZoneCommand.java:119)	at com.tommytony.war.command.WarCommandHandler.handle(WarCommandHandler.java:133)	at com.tommytony.war.War.onCommand(War.java:303)	at org.bukkit.command.PluginCommand.execute(PluginCommand.java:40)	at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:168)	at org.bukkit.craftbukkit.CraftServer.dispatchCommand(CraftServer.java:490)	at net.minecraft.server.NetServerHandler.handleCommand(NetServerHandler.java:862)	at net.minecraft.server.NetServerHandler.chat(NetServerHandler.java:822)	at net.minecraft.server.NetServerHandler.a(NetServerHandler.java:804)	at net.minecraft.server.Packet3Chat.handle(Packet3Chat.java:44)	at net.minecraft.server.NetworkManager.b(NetworkManager.java:281)	at net.minecraft.server.NetServerHandler.d(NetServerHandler.java:105)	at net.minecraft.server.ServerConnection.b(SourceFile:35)	at net.minecraft.server.DedicatedServerConnection.b(SourceFile:30)	at net.minecraft.server.MinecraftServer.q(MinecraftServer.java:559)	at net.minecraft.server.DedicatedServer.q(DedicatedServer.java:212)	at net.minecraft.server.MinecraftServer.p(MinecraftServer.java:474)	at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:406)	at net.minecraft.server.ThreadServerApplication.run(SourceFile:539)