Why doesn't this work?

Well it works fine, but it displays an error when the damage isn't a projectile.

Code:

//event handler/etc.
Entity pR = (Entity) event.getEntity();
 
//code
 
if(pR.getLastDamageCause().equals(DamageCause.PROJECTILE) &&
 
//code

When attacked by a projectile, it should set them on fire. Why is this an error?

 

It is nice when you provide error and all relevant code.

 

When you attack, and the damage cause isn't by an arrow, than it shows the error above.

Code:

@EventHandler
    public void onAttack(EntityDamageByEntityEvent event) {//Attack Event
        FileConfiguration c = pp.getConfig();
       
        Entity pR = (Entity) event.getEntity();
        Player pA = (Player) event.getDamager();
       
        ItemStack iH = pA.getItemInHand();...
 
if(pR.getLastDamageCause().equals(DamageCause.PROJECTILE) &&
            (pA instanceof Player) &&
            (c.getStringList("Races.Elf").contains(pA.getName()))) {//Elf Shoot Arrow
            random = new Random().nextInt(4) + 1;
           
            if(random == 2) {
                pR.setFireTicks(8);
               
            }//random
        }//elf shot arrow
    }//event handler end

Some more code. If 1-4 chance after being shot by an arrow, than set the entity being attacked on fire.

 

what is line 102 ?

 

pR.getLastDamageCause()