Script / Start() and Update() not being called

Hi There,

I have a script for an enemy with a NavMeshAgent to patrol diferent points and for some reason it won't work. When adding in Breakpoints in the code to find out what was happening, I discovered that neither Start() nor Update() were even being called! I have no idea why this is happening and before you ask: I have DEFINETLEY attached the script to the Enemy, There is DEFINITELY a NavMeshAgent on the enemy, I have DEFINETLY ticked the script on, and so on. I have checked absolutely everything and it still won't work. Please help if you can.

Code:

using System.Collections; using System.Collections.Generic; using UnityEngine; using UnityEngine.AI;

public class SimplePatrol : MonoBehaviour { [SerializeField] float _totalWaitTime = 3.0f;

 [SerializeField]
 bool _patrolWaiting;

 [SerializeField]
 float _switchProbability = 0.2f;

 [SerializeField]
 List<Waypoint> _patrolPoints;

 NavMeshAgent _navMeshAgent;
 int _currentPatrolIndex;
 bool _travelling;
 bool _waiting;    
 bool _patrolForward;
 float _waitTimer;


 // Use this for initialization
 void Start()
 {
     _navMeshAgent = this.GetComponent<NavMeshAgent>();

     if (_navMeshAgent == null)
     {
         Debug.LogError ("The nav mesh component is not attached");
     }
     else
     {
         if (_patrolPoints != null && _patrolPoints.Count >= 2)
         {
             _currentPatrolIndex = 0;
             SetDestination();
         }
         else
         {
             Debug.Log("Insufficent patrol points");
         }
     }
 }

 // Update is called once per frame
 void Update()
 {
     if (_travelling && _navMeshAgent.remainingDistance <= 1.0f)
     {
         _travelling = false;

         if (_patrolWaiting)
         {
             _waiting = true;
             _waitTimer = 0f;
         }
         else
         {
             ChangePatrolPoint();
             SetDestination();
         }
     }

     if (_waiting)
     {
         _waitTimer += Time.deltaTime;
         if (_waitTimer >= _totalWaitTime)
         {
             _waiting = false;

             ChangePatrolPoint();
             SetDestination();
         }
     }
 }

 private void SetDestination()
 {
     if (_patrolPoints != null)
     {
         Vector3 targetVector = _patrolPoints[_currentPatrolIndex].transform.position;
         _navMeshAgent.SetDestination(targetVector);
         _travelling = true;
     }
 }
 private void ChangePatrolPoint()
 {
     if (UnityEngine.Random.Range(0f, 1f) <= _switchProbability)
     {
         _patrolForward = !_patrolForward;
     }

     if (_patrolForward)
     {
         _currentPatrolIndex = (_currentPatrolIndex + 1) % _patrolPoints.Count; 
     }
     else
     {
         if (--_currentPatrolIndex < 0)
         {
             _currentPatrolIndex = _patrolPoints.Count - 1;
         }
     }
 }

}