OnWhisperGlobal Event Error npc_event event not found

[mugenkaiken]

Hi as the title says I'm getting an [Error]: npc_event: event not found [Warpcreator::OnWhisperGlobal]

here is my code 

-    script    Warpcreator    -1,{
OnWhisperGlobal:
    if(getgmlevel() < 99) end;
    if(@whispervar0$ == "Warpcreate")
        {
            // Dialogue setup
            switch(select("Create Warp Portal","Nevermind"))
            {
                case 1:
                    mes("Greetings, esteemed Game Master! I can help you create a warp portal.");
                    next;
                    mes("Please provide me with the necessary details to create the portal.");
                    next;
                    
                    mes "Enter the X coordinate for the portal's placement:";
                    input .@portalX;
                    next;
                    mes "Enter the Y coordinate for the portal's placement:";
                    input .@portalY;
                    next;
                    mes "Enter the destination map name:";
                    input .@map$;
                    next;
                    mes "Enter the destination X coordinate:";
                    input .@destX;
                    next;
                    mes "Enter the destination Y coordinate:";
                    input .@destY;
                    
                    warpportal .@portalX,.@portalY,.@map$,.@destX,.@destY;
                    
                    mes("You have successfully created a warp portal to " + .@map$ + ".");
                    close2;
                    
                case 2:
                    mes("Alright, esteemed Game Master. Feel free to return if you ever need my assistance.");
                    close;
            }
        }
    end;
}

 

[Rynbef]

Which Server Version ur using ?

 

Rynbef~