Leashing an Entity to a fence (1.9)

Hi all,

I need help with a plugin that leash an entity to a fence.
But when I use the command I get a NullPointerException on line 8.

My current code:

Code:

if(label.equalsIgnoreCase("test")) {
            Player p = (Player) sender;
            Location l = p.getLocation();
            Location el = p.getLocation().add(5, 0, 0);
          
            l.getBlock().setType(Material.FENCE);
   
            LeashHitch leash = p.getWorld().spawn(l, LeashHitch.class);
   
            Cow cow = p.getWorld().spawn(el, Cow.class);
            cow.setLeashHolder(leash);
        }

Does anyone know how to solve this?
Thanks

 

Use cmd.getName() instead of label. Label is only there for backwards compatibility.

Are you sure the location is not null? Are you sure the world is not null? Have you debugged?

 

@Zombie_Striker
Yes I've debugged, the error is on .spawn(

 

@Koningpeter
Does that mean that the world is null? Have you tried using the .spawnEntity() method instead?

 

@Zombie_Striker
Nope, the location isn't null. I've tried, but .spawnEntity() don't work...