2013-06-11 21:58:56 [SEVERE] Error occurred while enabling WeaponLevels v1.2.4 (Is it up to date?)
java.lang.NoClassDefFoundError: think/rpgitems/api/RPGItems
	at com.coffeecup.novus.weaponlevels.Plugin.onEnable(Plugin.java:49)
	at org.bukkit.plugin.java.JavaPlugin.setEnabled(JavaPlugin.java:217)
	at org.bukkit.plugin.java.JavaPluginLoader.enablePlugin(JavaPluginLoader.java:457)
	at org.bukkit.plugin.SimplePluginManager.enablePlugin(SimplePluginManager.java:381)
	at org.bukkit.craftbukkit.v1_5_R3.CraftServer.loadPlugin(CraftServer.java:282)
	at org.bukkit.craftbukkit.v1_5_R3.CraftServer.enablePlugins(CraftServer.java:264)
	at net.minecraft.server.v1_5_R3.MinecraftServer.j(MinecraftServer.java:304)
	at net.minecraft.server.v1_5_R3.MinecraftServer.e(MinecraftServer.java:283)
	at net.minecraft.server.v1_5_R3.MinecraftServer.a(MinecraftServer.java:243)
	at net.minecraft.server.v1_5_R3.DedicatedServer.init(DedicatedServer.java:151)
	at net.minecraft.server.v1_5_R3.MinecraftServer.run(MinecraftServer.java:382)
	at net.minecraft.server.v1_5_R3.ThreadServerApplication.run(SourceFile:573)
Caused by: java.lang.ClassNotFoundException: think.rpgitems.api.RPGItems
	at java.net.URLClassLoader$1.run(Unknown Source)
	at java.net.URLClassLoader$1.run(Unknown Source)
	at java.security.AccessController.doPrivileged(Native Method)
	at java.net.URLClassLoader.findClass(Unknown Source)
	at org.bukkit.plugin.java.PluginClassLoader.findClass0(PluginClassLoader.java:80)
	at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.java:53)
	at java.lang.ClassLoader.loadClass(Unknown Source)
	at java.lang.ClassLoader.loadClass(Unknown Source)
	... 12 more

2013-06-11 21:59:03 [SEVERE] Error occurred while disabling WeaponLevels v1.2.4 (Is it up to date?)
java.lang.NullPointerException
	at com.coffeecup.novus.weaponlevels.Blocks.saveBlockStore(Blocks.java:82)
	at com.coffeecup.novus.weaponlevels.Plugin.onDisable(Plugin.java:77)
	at org.bukkit.plugin.java.JavaPlugin.setEnabled(JavaPlugin.java:219)
	at org.bukkit.plugin.java.JavaPluginLoader.disablePlugin(JavaPluginLoader.java:481)
	at org.bukkit.plugin.SimplePluginManager.disablePlugin(SimplePluginManager.java:400)
	at org.bukkit.plugin.SimplePluginManager.disablePlugins(SimplePluginManager.java:393)
	at org.bukkit.craftbukkit.v1_5_R3.CraftServer.disablePlugins(CraftServer.java:277)
	at net.minecraft.server.v1_5_R3.MinecraftServer.stop(MinecraftServer.java:334)
	at net.minecraft.server.v1_5_R3.MinecraftServer.run(MinecraftServer.java:441)
	at net.minecraft.server.v1_5_R3.ThreadServerApplication.run(SourceFile:573)