Invalid Call. Nonexistent function 'instance' in base 'GDScript'.

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:bust_in_silhouette: Asked By D.Q.Li

I am learning Godot through HeartBeast’s tutorial and get this error while using the exact same code.
EDIT: sorry I accidentally post it before putting up the code.

extends Node2D

func _process(delta):
if Input.is_action_just_pressed(“attack”):
var grassEffect = load(“res://Action RPG Resources/Effects/grass effect.gd”)
var Grasseffect = grassEffect.instance()
var world = get_tree().current_scene
world.add_child(grassEffect)
queue_free()
I saw the solution in another similar question but the method does not apply to me. Instead it says “invalid type in function ‘add_child’ in base Node2D, the object-derived class of argument 1 (packed scene) is not a subclass of the expected argument class”

“invalid type in function ‘add_child’” you aren’t trying add Grasseffect instead grassEffect? you needed understand what variable is for what.

Moreus | 2023-03-10 11:13

you could link tutorial and use code as code not text

Moreus | 2023-03-10 11:16

yeah thats the reason, thank you very much

D.Q.Li | 2023-03-10 11:22

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kitticpet | 2023-03-11 07:13

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:bust_in_silhouette: Reply From: zhyrin

Into your grassEffect variable you load a file with a .gd extension, this means the variable will have a type of GDScript. The type GDScript doesn’t have a function called instance() (which is what the error message tells you.

In you code you treat GrassEffect as if it’s a scene, so you need to load your scene file (.tres) into grassEffect.

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:bust_in_silhouette: Reply From: aidave

For instancing a .gd file, you use “.new()”

For a scene you use “.instance()” or in v4 it’s now “.instantiate()”

I usually do this to avoid confusion:

var grass_effect_tscn = load("res://grass.tscn")
var grass_effect = grass_effect_tscn.instance()

And also consider on top, for optimization:

const grass_effect_tscn = preload("res://grass.tscn")