Bukkit

What is the problem?
- get server.log error when command

What steps will reproduce the problem?
- command /ha undo without /rollback something before since login on server.

What version of HawkEye are you using (shown in console during start-up)?
1.0.5b (newest)

Show me any console errors and/or your start-up console message for HawkEye
2012-01-19 16:13:49 [SEVERE] null
org.bukkit.command.CommandException: Unhandled exception executing command 'ha' in plugin HawkEye v1.0.5b
    at org.bukkit.command.PluginCommand.execute(PluginCommand.java:42)
    at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:165)
    at org.bukkit.craftbukkit.CraftServer.dispatchCommand(CraftServer.java:378)
    at net.minecraft.server.NetServerHandler.handleCommand(NetServerHandler.java:757)
    at net.minecraft.server.NetServerHandler.chat(NetServerHandler.java:722)
    at net.minecraft.server.NetServerHandler.a(NetServerHandler.java:715)
    at org.getspout.spout.SpoutNetServerHandler.a(SpoutNetServerHandler.java:180)
    at net.minecraft.server.Packet3Chat.a(Packet3Chat.java:33)
    at net.minecraft.server.NetworkManager.b(NetworkManager.java:226)
    at net.minecraft.server.NetServerHandler.a(NetServerHandler.java:93)
    at org.getspout.spout.SpoutNetServerHandler.a(SpoutNetServerHandler.java:550)
    at net.minecraft.server.NetworkListenThread.a(SourceFile:108)
    at net.minecraft.server.MinecraftServer.w(MinecraftServer.java:527)
    at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:425)
    at net.minecraft.server.ThreadServerApplication.run(SourceFile:457)
Caused by: java.lang.NullPointerException
    at uk.co.oliwali.HawkEye.Undo.<init>(Undo.java:35)
    at uk.co.oliwali.HawkEye.commands.UndoCommand.execute(UndoCommand.java:20)
    at uk.co.oliwali.HawkEye.commands.BaseCommand.run(BaseCommand.java:75)
    at uk.co.oliwali.HawkEye.HawkEye.onCommand(HawkEye.java:282)
    at org.bukkit.command.PluginCommand.execute(PluginCommand.java:40)
    ... 14 more

Show me your config.yml and/or your config.php (REMOVE YOUR PASSWORD)
http://pastebin.com/NMHhwiPe

Have you checked the FAQ page?
no