MV import error

[31;1mFAILED.[m
[WARNING] Unexpected exception while parsing console command
org.bukkit.command.CommandException: Unhandled exception executing command 'mv' in plugin Multiverse-Core v2.5-b556
at org.bukkit.command.PluginCommand.execute(PluginCommand.java:42)
at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:166)
at org.bukkit.craftbukkit.CraftServer.dispatchCommand(CraftServer.java:479)
at org.bukkit.craftbukkit.CraftServer.dispatchServerCommand(CraftServer.java:475)
at net.minecraft.server.MinecraftServer.b(MinecraftServer.java:612)
at net.minecraft.server.MinecraftServer.w(MinecraftServer.java:581)
at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:459)
at net.minecraft.server.ThreadServerApplication.run(SourceFile:492)
Caused by: java.lang.NullPointerException
at com.onarandombox.MultiverseCore.commands.ImportCommand.getPotentialWorlds(ImportCommand.java:86)
at com.onarandombox.MultiverseCore.commands.ImportCommand.runCommand(ImportCommand.java:157)
at com.pneumaticraft.commandhandler.multiverse.CommandHandler.checkAndRunCommand(CommandHandler.java:279)
at com.pneumaticraft.commandhandler.multiverse.CommandHandler.processFoundCommands(CommandHandler.java:143)
at com.pneumaticraft.commandhandler.multiverse.CommandHandler.locateAndRunCommand(CommandHandler.java:93)
at com.onarandombox.MultiverseCore.MultiverseCore.onCommand(MultiverseCore.java:731)
at org.bukkit.command.PluginCommand.execute(PluginCommand.java:40)
... 7 more