attempt to get length of local 'target_ply' (a userdata value) [HELP]

[anyome]

Hello guys!

Can anyone help me with my addon
I'm trying to get it works but i get this error:

Player: !advert Player test
addons/ulx/lua/ulx/modules/sh/advertsystem.lua:6: attempt to get length of local 'target_ply' (a userdata value)

Here is my addon

Code: Lua

1. function ulx.advertsystem( calling_ply, target_ply, reason )
2.  
3.  
4.         local affected_ply = {}
5.        
6.         for i=1, #target_ply do
7.        
8.                 local v = target_ply[ i ]      
9.  
10.                 timer.Simple(1, function()
11.                
12.                         if IsValid(v) then
13.                                 net.Start( "AdvertsMenu" )
14.                                 net.Send( v )
15.                         end
16.                        
17.                 end)
18.         end
19.        
20. end
21.  
22.  
23. local advertsystem = ulx.command( CATEGORY_NAME, "ulx advert", ulx.advertsystem, "!advert" )
24. advertsystem:addParam{ type=ULib.cmds.PlayerArg }
25. advertsystem:addParam{ type=ULib.cmds.StringArg, hint="reason", ULib.cmds.takeRestOfLine }
26. advertsystem:defaultAccess( ULib.ACCESS_ADMIN )
27. advertsystem:help( "send an advert." )
28.  

[Megiddo]

Change PlayerArg to PlayersArg