2012-08-22 19:04:20 [SEVERE] Could not pass event PlayerCommandPreprocessEvent to CommandWatcher

org.bukkit.event.EventException

	at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:332)

	at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:62)

	at org.bukkit.plugin.SimplePluginManager.fireEvent(SimplePluginManager.java:477)

	at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:462)

	at net.minecraft.server.NetServerHandler.handleCommand(NetServerHandler.java:871)

	at net.minecraft.server.NetServerHandler.chat(NetServerHandler.java:825)

	at net.minecraft.server.NetServerHandler.a(NetServerHandler.java:807)

	at net.minecraft.server.Packet3Chat.handle(Packet3Chat.java:44)

	at net.minecraft.server.NetworkManager.b(NetworkManager.java:276)

	at net.minecraft.server.NetServerHandler.d(NetServerHandler.java:109)

	at net.minecraft.server.ServerConnection.b(SourceFile:35)

	at net.minecraft.server.DedicatedServerConnection.b(SourceFile:30)

	at net.minecraft.server.MinecraftServer.q(MinecraftServer.java:581)

	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)

Caused by: java.lang.IllegalArgumentException: Illegal group reference

	at java.util.regex.Matcher.appendReplacement(Matcher.java:807)

	at java.util.regex.Matcher.replaceAll(Matcher.java:905)

	at java.lang.String.replaceAll(String.java:2210)

	at me.mcluke300.commandlistener.CommandListener.oncommand(CommandListener.java:138)

	at me.mcluke300.commandlistener.clistener.onPlayerCommandPreprocess(clistener.java:16)

	at sun.reflect.GeneratedMethodAccessor130.invoke(Unknown Source)

	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)

	at java.lang.reflect.Method.invoke(Method.java:601)

	at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:330)

	... 16 more