Missing Field Exception: Field "UnityEngine.TextMesh.text" not found

Hey People, I keep getting two field not found exceptions: First one when I try to change the objects name: Missing Field Exception "UnityEngine.GameObject.name" and Secondly when i try to cast the name on the TextMesh: Missing Field Exception "UnityEngine.TextMesh.text" (Instantiator is a String Array)

Here is my code:

function Update() {
    if(Instantiator.length != 1) {
        for(var i = 0; i < Instantiator.length; i++) {
            var chara = Instantiate(Character, Vector3(10,10,10), Quaternion.identity);
            Debug.Log("Instantiated");
            chara.name = Instantiator[i];
            chara.GetComponentInChildren(TextMesh).text = Instantiator[i];
            Users.Add(chara);
            if(Login.GetNick() == Instantiator[i]) {
                Character = chara;
                Character.GetComponent("Third Person Camera").SetTarget(camera.main.transform);
                Character.GetComponent("Third Person Controller").enabled = true;
            }
            else {
                chara.GetComponent("Third Person Controller").enabled = false;
            }
            Instantiator.RemoveAt(i);
        }
    }
}

PS: I am trying to communicate between non Unity thread and Unity thread, atm i am using an array to store names and this script checking if anything needs to be instantiated, if there is a more effecient way of doing this please let me know.