Bukkit

What version of Bukkit are you using?
CraftBukkit version git-Spigot-1387 (MC: 1.7.8) (Implementing API version 1.7.5-R0.1-SNAPSHOT)
(happened with 1.7.2 too)

What version of MineralManager are you using?
MineralManager version 2.2.1

Please give a brief description of the problem.
Unable to use the console to create a region. This is to fix a larger problem, which will be outlined in a separate ticket.

Was there any output generated in the command prompt when this error occurred? If so, what was it?
[19:55:43 WARN]: java.lang.reflect.InvocationTargetException
[19:55:43 WARN]:        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
[19:55:43 WARN]:        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
[19:55:43 WARN]:        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
[19:55:43 WARN]:        at java.lang.reflect.Method.invoke(Method.java:606)
[19:55:43 WARN]:        at me.hellfire212.shaded.mondocommand.dynamic.SubCommandFinder$1.handle(SubCommandFinder.java:66)
[19:55:43 WARN]:        at me.hellfire212.shaded.mondocommand.MondoCommand.handleRawCommand(MondoCommand.java:95)
[19:55:43 WARN]:        at me.hellfire212.shaded.mondocommand.MondoCommand.onCommand(MondoCommand.java:55)
[19:55:43 WARN]:        at org.bukkit.command.PluginCommand.execute(PluginCommand.java:44)
[19:55:43 WARN]:        at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:180)
[19:55:43 WARN]:        at org.bukkit.craftbukkit.v1_7_R2.CraftServer.dispatchCommand(CraftServer.java:719)
[19:55:43 WARN]:        at org.bukkit.craftbukkit.v1_7_R2.CraftServer.dispatchServerCommand(CraftServer.java:706)
[19:55:43 WARN]:        at net.minecraft.server.v1_7_R2.DedicatedServer.ax(DedicatedServer.java:309)
[19:55:43 WARN]:        at net.minecraft.server.v1_7_R2.DedicatedServer.v(DedicatedServer.java:274)
[19:55:43 WARN]:        at net.minecraft.server.v1_7_R2.MinecraftServer.u(MinecraftServer.java:568)
[19:55:43 WARN]:        at net.minecraft.server.v1_7_R2.MinecraftServer.run(MinecraftServer.java:474)
[19:55:43 WARN]:        at net.minecraft.server.v1_7_R2.ThreadServerApplication.run(SourceFile:618)
[19:55:43 WARN]: Caused by: java.lang.NullPointerException
[19:55:43 WARN]:        at org.bukkit.conversations.Conversation.begin(Conversation.java:186)
[19:55:43 WARN]:        at me.hellfire212.MineralManager.dialogue.CreateRegion.begin(CreateRegion.java:59)
[19:55:43 WARN]:        at me.hellfire212.MineralManager.Commands.create(Commands.java:74)
[19:55:43 WARN]:        ... 16 more