Pathing & Patrol AI Error

Here is the full Code as requested:

     using UnityEngine;
     using System.Collections;
     
     public class EnemyAI : MonoBehaviour 
     {
         public Transform target;//This is what the AI looks for, the Target must  be tagged "Player"
         public int moveSpeed;// This is a base value of how fast the AI moves
         public int rotationSpeed;// This is a Base Value of how fast the AI rotates
         public int powerWalkMultiplier = 2;//The Multiplier for Power Walking
         public int runSpeedMultiplier = 4;//The Multiplier for Running
         public float patrolRangePos = 0.0f;//How far does the AI patrol
         public float patrolRangeNeg = 0.0f;//^
         private float patrolInc = 0.25f;// increment of the Patrol
         private Vector3 patrolAmount;
         private Transform myTransform;
         
         void Awake()
         {
             myTransform = transform;//Keeps it Active
         }
         
         // Use this for initialization
         void Start () 
         {
             GameObject go = GameObject.FindGameObjectWithTag("Player");
             
             target = go.transform;
             
         }
         
         // Update is called once per frame
         void Update () 
         {
             Debug.DrawLine(target.position, myTransform.position, Color.green);//Plots course
     
             float distance = Vector3.Distance (this.transform.position, GameObject.FindGameObjectWithTag("Player").transform.position);//Calculate Distance
             
             if(distance < 10.0)//Chase Range
             {
                 //Debug.LogWarning("Enemy Sighted! Pursuing!!!");
                 Debug.DrawLine(target.position, myTransform.position, Color.red);
                 //Look At Target, Oh look! Target!
                 myTransform.rotation = Quaternion.Slerp(myTransform.rotation, Quaternion.LookRotation(target.position - myTransform.position), rotationSpeed*Time.deltaTime);
                 //This takes the Cube's transform via a Slerp, it's a rotation based on the angle it's loking at 
     
             
                 //Move to Target, Hooray Savings!
                 myTransform.position += myTransform.forward * (moveSpeed * runSpeedMultiplier) * Time.deltaTime;//Trigger Run Speed
             }//End Chase Range
             else if(distance < 20.0)//Investigate Range
             {
                 //Debug.LogWarning("Enemy Detected, Investigating...");
                 Debug.DrawLine(target.position, myTransform.position, Color.yellow);
                 //Look At Target, Oh look! Target!
                 myTransform.rotation = Quaternion.Slerp(myTransform.rotation, Quaternion.LookRotation(target.position - myTransform.position), rotationSpeed*Time.deltaTime);
                 //This takes the Cube's transform via a Slerp, it's a rotation based on the angle it's loking at 
                 
             
                 //Move to Target, Hooray Savings!
                 myTransform.position += myTransform.forward * (moveSpeed * powerWalkMultiplier) * Time.deltaTime;//Trigger power walk Speed
             }//End Investigate Range
             else if(distance > 20.0)//Patrol Range
             {
     
                 //Debug.LogWarning("Lost Target, returning to patrol");
             
                 //Look for Target, Where are the savings... Savings!
                 patrolAmount.x = patrolInc * ((float)moveSpeed * 2f) * Time.deltaTime;
         
                 if (patrolInc > 0.0f && transform.position.x >= patrolRangePos)
                 {
                     patrolInc = -1.0f;
                 }
                 else if (patrolInc < 0.0f && transform.position.x <= patrolRangeNeg)
                 {
                         patrolInc = 1.0f;
                 }
                 transform.Translate(patrolAmount);
             }
             
         }
         
     }