When restarting

2013-01-05 20:37:21 [INFO] [UltraLogger] Disabling UltraLogger v1.6.9
2013-01-05 20:37:21 [SEVERE] Error occurred while disabling UltraLogger v1.6.9 (Is it up to date?)
java.lang.NullPointerException
	at org.ultralogger.LoggerFile.close(LoggerFile.java:200)
	at org.ultralogger.logger.ChatLogger.disable(ChatLogger.java:45)
	at org.ultralogger.MainLogger.disable(MainLogger.java:454)
	at org.ultralogger.MainLogger.onDisable(MainLogger.java:142)
	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_4_6.CraftServer.disablePlugins(CraftServer.java:273)
	at net.minecraft.server.v1_4_6.MinecraftServer.stop(MinecraftServer.java:351)
	at net.minecraft.server.v1_4_6.MinecraftServer.run(MinecraftServer.java:458)
	at net.minecraft.server.v1_4_6.ThreadServerApplication.run(SourceFile:849)