Bukkit

What steps will reproduce the problem?
1. Typing /v
2.
3.

What version of the product are you using?

Most Recent

Do you have an error log of what happened?

[SEVERE] null
org.bukkit.command.CommandException: Unhandled exception executing command 'v' in plugin VanishPro v1.3
    at org.bukkit.command.PluginCommand.execute(PluginCommand.java:46)
    at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:186)
    at org.bukkit.craftbukkit.v1_4_R1.CraftServer.dispatchCommand(CraftServer.java:514)
    at net.minecraft.server.v1_4_R1.PlayerConnection.handleCommand(PlayerConnection.java:980)
    at net.minecraft.server.v1_4_R1.PlayerConnection.chat(PlayerConnection.java:898)
    at net.minecraft.server.v1_4_R1.PlayerConnection.a(PlayerConnection.java:853)
    at net.minecraft.server.v1_4_R1.Packet3Chat.handle(Packet3Chat.java:44)
    at net.minecraft.server.v1_4_R1.NetworkManager.b(NetworkManager.java:290)
    at net.minecraft.server.v1_4_R1.PlayerConnection.d(PlayerConnection.java:113)
    at net.minecraft.server.v1_4_R1.ServerConnection.b(SourceFile:39)
    at net.minecraft.server.v1_4_R1.DedicatedServerConnection.b(SourceFile:30)
    at net.minecraft.server.v1_4_R1.MinecraftServer.r(MinecraftServer.java:598)
    at net.minecraft.server.v1_4_R1.DedicatedServer.r(DedicatedServer.java:224)
    at net.minecraft.server.v1_4_R1.MinecraftServer.q(MinecraftServer.java:494)
    at net.minecraft.server.v1_4_R1.MinecraftServer.run(MinecraftServer.java:427)
    at net.minecraft.server.v1_4_R1.ThreadServerApplication.run(SourceFile:849)
Caused by: java.lang.IllegalArgumentException: Player list names can only be a maximum of 16 characters long
    at org.bukkit.craftbukkit.v1_4_R1.entity.CraftPlayer.setPlayerListName(CraftPlayer.java:168)
    at com.iAlexak.VanishPro.VanishPro.enableVanish(VanishPro.java:25)
    at com.iAlexak.VanishPro.VanishPro.onCommand(VanishPro.java:95)
    at org.bukkit.command.PluginCommand.execute(PluginCommand.java:44)

Please provide any additional information below.

It turns the person invisible but says internal error still.