2012-12-14 17:04:22 [SEVERE] null
org.bukkit.command.CommandException: Unhandled exception executing command 'shopkeeper' in plugin Shopkeepers v1.9
	at org.bukkit.command.PluginCommand.execute(PluginCommand.java:46)
	at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:186)
	at org.bukkit.craftbukkit.v1_4_5.CraftServer.dispatchCommand(CraftServer.java:536)
	at net.minecraft.server.v1_4_5.NetServerHandler.handleCommand(NetServerHandler.java:999)
	at net.minecraft.server.v1_4_5.NetServerHandler.chat(NetServerHandler.java:917)
	at net.minecraft.server.v1_4_5.NetServerHandler.a(NetServerHandler.java:861)
	at net.minecraft.server.v1_4_5.Packet3Chat.handle(Packet3Chat.java:44)
	at net.minecraft.server.v1_4_5.NetworkManager.b(NetworkManager.java:290)
	at net.minecraft.server.v1_4_5.NetServerHandler.d(NetServerHandler.java:113)
	at net.minecraft.server.v1_4_5.ServerConnection.b(SourceFile:39)
	at net.minecraft.server.v1_4_5.DedicatedServerConnection.b(SourceFile:30)
	at net.minecraft.server.v1_4_5.MinecraftServer.r(MinecraftServer.java:582)
	at net.minecraft.server.v1_4_5.DedicatedServer.r(DedicatedServer.java:222)
	at net.minecraft.server.v1_4_5.MinecraftServer.q(MinecraftServer.java:478)
	at net.minecraft.server.v1_4_5.MinecraftServer.run(MinecraftServer.java:413)
	at net.minecraft.server.v1_4_5.ThreadServerApplication.run(SourceFile:856)
Caused by: java.lang.NoClassDefFoundError: net/minecraft/server/NBTBase
	at com.nisovin.shopkeepers.shopobjects.VillagerShop.overwriteAI(VillagerShop.java:73)
	at com.nisovin.shopkeepers.shopobjects.LivingEntityShop.spawn(LivingEntityShop.java:64)
	at com.nisovin.shopkeepers.shopobjects.VillagerShop.spawn(VillagerShop.java:36)
	at com.nisovin.shopkeepers.Shopkeeper.spawn(Shopkeeper.java:87)
	at com.nisovin.shopkeepers.ShopkeepersPlugin.createNewAdminShopkeeper(ShopkeepersPlugin.java:332)
	at com.nisovin.shopkeepers.ShopkeepersPlugin.onCommand(ShopkeepersPlugin.java:302)
	at org.bukkit.command.PluginCommand.execute(PluginCommand.java:44)
	... 15 more
Caused by: java.lang.ClassNotFoundException: net.minecraft.server.NBTBase
	at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.java:34)
	at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.java:29)
	at java.lang.ClassLoader.loadClass(Unknown Source)
	at java.lang.ClassLoader.loadClass(Unknown Source)
	... 22 more