Godot Invalid to get index 'x' (On Base: 'Node (a.gd)')

Question

im trying to hold a path to a game object (bat.tscn) in a script and use it to instanceate a object from a different script. Name of the script that holds the variable is called a.gd and the one that is responsible for instantiating is b.gd and the name of the variable is x. But for some reason every time i try to use the variable it gives me an error;

Invalid to get index 'x' (On Base: 'Node (a.gd)')

a.gd;

func _process(delta):
var SlotOne = $"res://Objects/Weapons/Bat.tscn

b.gd;

onready var InvManager = get_node("../a") #gets the script.

func _physics_process(delta):
    changeWeapons()

func changeWeapons():
    if Input.is_key_pressed(KEY_1):
        load(InvManager.SlotOne)
    elif Input.is_key_pressed(KEY_2):
        print("2")
    elif Input.is_key_pressed(KEY_3):
        print("3")
    elif Input.is_key_pressed(KEY_4):
        print("4")    

any ideas how can i fix this issue? Im pretty new to the game engine so im kinda stuck here.

Answer 1

It appears you declared SlotOne inside of _process. That makes it a local variable. In other words, this variable will only be availabe inside that _process, and thus, you cannot reach it from another script.

Define the variables you want to reach from other scripts outside of any method (func) - the language guidlines encourage to place them near the start of the file, before any methods.