npc

011-04-06 12:48:03 [SEVERE] null
org.bukkit.command.CommandException: Unhandled exception executing command 'npc' in plugin Citizens v1.07
	at org.bukkit.command.PluginCommand.execute(PluginCommand.java:37)
	at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:80)
	at org.bukkit.craftbukkit.CraftServer.dispatchCommand(CraftServer.java:233)
	at net.minecraft.server.NetServerHandler.c(NetServerHandler.java:594)
	at net.minecraft.server.NetServerHandler.chat(NetServerHandler.java:557)
	at net.minecraft.server.NetServerHandler.a(NetServerHandler.java:551)
	at net.minecraft.server.Packet3Chat.a(SourceFile:24)
	at net.minecraft.server.NetworkManager.a(NetworkManager.java:198)
	at net.minecraft.server.NetServerHandler.a(NetServerHandler.java:72)
	at net.minecraft.server.NetworkListenThread.a(SourceFile:100)
	at net.minecraft.server.MinecraftServer.h(MinecraftServer.java:368)
	at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:283)
	at net.minecraft.server.ThreadServerApplication.run(SourceFile:375)
Caused by: java.lang.LinkageError: loader constraint violation: loader (instance of org/bukkit/plugin/java/PluginClassLoader) previously initiated loading for a different type with name "com/nijiko/permissions/PermissionHandler"
	at com.fullwall.Citizens.Permission.permission(Permission.java:37)
	at com.fullwall.Citizens.Permission.generic(Permission.java:49)
	at com.fullwall.Citizens.CommandExecutors.BasicNPCCommandExecutor.hasPermission(BasicNPCCommandExecutor.java:624)
	at com.fullwall.Citizens.CommandExecutors.BasicNPCCommandExecutor.onCommand(BasicNPCCommandExecutor.java:42)
	at org.bukkit.command.PluginCommand.execute(PluginCommand.java:35)
	... 12 more