The name 'LevelUpSystem' does not denote a valid type ('not found').

Questions & Answers
1

Here is the script

#pragma strict

private var levelUpScript : LevelUpSystem;

function Start () 
{	
	levelUpScript = GameObject.Find("First Person Controller").GetComponent(LevelUpSystem);
}

function OnTriggerEnter (Col : Collider)
{
	if(Col.tag == "Player")
	{
		Destroy(gameObject);
		levelUpScript.currentXP += 10;
	}
}
2

Do you have a file called LevelUpSystem.js?
Are you mixing c# and JavaScript/UnityScript?

You really should use generics with GetComponent so it returns the expected Type and not type of Component.

levelUpScript = GameObject.Find("First Person Controller").GetComponent.<LevelUpSystem>();

We are missing some information to help you with this.

3

@Landern Hi!I am not rlly into scripting and stuffs like that and i got this script from youtube.I’ve tried your ideea and unfortunetly didnt work.If you know a way i could learn scripting i would rlly appreciate if you tell me :D.