Getting invalid access to property or key

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1

Godot Version

4.6

Question

So i am making a rhythm game and after like 20 seconds of playing the game it stops and i get this: E 0:00:43:135 _process: Invalid access to property or key ‘pass_threshold’ on a base object of type ‘Nil’.

I dont know what to do about it. i will include the code to help. Tell me if you need photos of the project because i will send it if needed. Please help and thank you

If you share code, please wrap it inside three backticks or replace the code in the next block:

#Error: 
_process: Invalid access to property or key ‘pass_threshold’ on a base object of type ‘Nil’.

#Falling key.gd 
extends Sprite2D

@export var fall_speed: float = 2.5

var init_y_pos: float = -360

var has_passed:bool = false
var pass_threshold = 300.0

func _init():
	set_process(false)

func _process(_delta):
	global_position += Vector2(0, fall_speed)
	
	if global_position.y > pass_threshold and not $Timer.is_stopped():
		# print($Timer.wait_time - $Timer.time_left)
		$Timer.stop()
		has_passed = true


func Setup(target_x: float, target_frame: int):
	global_position = Vector2(target_x, init_y_pos)
	frame = target_frame
	
	set_process(true)
	


func _on_destroy_timer_timeout():
	queue_free()

#KeyListener.gd
extends Sprite2D

@onready var falling_key = preload("res://Scenes/Level Scenes/Level 3 Scenes/falling_key.tscn")
@onready var score_text = preload("res://Scenes/Level Scenes/Level 3 Scenes/score_press_text.tscn")
@export var key_name: String = ""

var falling_key_queue = []

var perfect_press_threshold: float = 30
var great_press_threshold: float = 50
var good_press_threshold: float = 60
var ok_press_threshold: float = 80

var perfect_press_score = 250
var great_press_score = 100 
var good_press_score = 50
var ok_press_score = 20

# Called every frame. 'delta' is the elapsed time since the previous frame.
func _process(_delta):
	if falling_key_queue.size() > 0:
		if falling_key_queue.front().has_passed:
			falling_key_queue.pop_front()
			
			var st_inst = score_text.instantiate()
			get_tree().get_root().call_deferred("add_child", st_inst)
			st_inst.SetTextInfo("MISS")
			st_inst.global_position = global_position + Vector2(0, -20)
			Level3Signals.ResetCombo.emit()
			
		if Input.is_action_just_pressed(key_name):
			var key_to_pop = falling_key_queue.pop_front()
			
			var distance_from_pass = abs(key_to_pop.pass_threshold - key_to_pop.global_position.y)
			
			var press_score_text: String = ""
			if distance_from_pass < perfect_press_threshold:
				Level3Signals.IncrementScore.emit(perfect_press_score)
				press_score_text = "PERFECT"
				Level3Signals.IncrementCombo.emit()
			elif distance_from_pass < great_press_threshold:
				Level3Signals.IncrementScore.emit(great_press_score)
				press_score_text = "GREAT"
				Level3Signals.IncrementCombo.emit()
			elif distance_from_pass < good_press_threshold:
				Level3Signals.IncrementScore.emit(good_press_score)
				press_score_text = "GOOD"
				Level3Signals.IncrementCombo.emit()
			elif distance_from_pass < ok_press_threshold:
				Level3Signals.IncrementScore.emit(ok_press_score)
				press_score_text = "OK"
				Level3Signals.IncrementCombo.emit()
			else:
				press_score_text = "MISS"
				Level3Signals.ResetCombo.emit()
			
			key_to_pop.queue_free()
			
			var st_inst = score_text.instantiate()
			get_tree().get_root().call_deferred("add_child", st_inst)
			st_inst.SetTextInfo(press_score_text)
			st_inst.global_position = global_position + Vector2(0, -20)
	
	

func CreateFallingKey():
	var fk_inst = falling_key.instantiate()
	get_tree().get_root().call_deferred("add_child", fk_inst)
	fk_inst.Setup(position.x, frame + 4)

	falling_key_queue.push_back(fk_inst)


func _on_random_spawm_timer_timeout():
	CreateFallingKey()
	$RandomSpawmTimer.wait_time = randf_range(0.4, 3)
	$RandomSpawmTimer.start()
2

You’re trying to access something that doesn’t exist, using pass_treshold either as an index, key or comparison.

Better than copy paste the entire script is to just add the parts you have problems with. A line should be highlighted whenever the game breaks.

3

Is this the line causing the error?

var distance_from_pass = abs(key_to_pop.pass_threshold - key_to_pop.global_position.y)

In that case, key_to_pop would be null. It is initialized as:

var key_to_pop = falling_key_queue.pop_front()

pop_front() will return null if the array is empty. Either that, or there’s a null value stored in the array.

4

i fixed the problem thanks for helping