navAgent.velocity input returns NaN

Hi all

Here is a script I have attached to a navAgent to navigate a mesh. using UnityEngine; using System.Collections; using BehaviorDesigner.Runtime; using UnityEngine.AI;

 public class MovementScript : MonoBehaviour
 {
     //link to Animator component
     public Animator animController;
     //used to set anim controller parameters
     public enum MoveState { Idle,Walking,Attack}
     public MoveState moveState;
     //link to NavMeshAgent component
     public NavMeshAgent navAgent;
     public BehaviorTree behaviorTree;
     private bool canSeePlayer;
     private bool canAttack;
     public float damageAmount;
    
 
     public void Start()
     
     {
         canSeePlayer = ((SharedBool)behaviorTree.GetVariable("Chase")).Value;
         canAttack = ((SharedBool)behaviorTree.GetVariable("Attack")).Value;             
        
     }
      
     // Update is called once per frame
     void Update()
     {
         //character walks if there is a navigation path set, idle all other times
         canSeePlayer = ((SharedBool)behaviorTree.GetVariable("Chase")).Value;
         canAttack = ((SharedBool)behaviorTree.GetVariable("Attack")).Value;
         
 
 
         if (canSeePlayer)
 
         {
             moveState = MoveState.Walking;
             print(moveState);
             print("I see you!");
 
             if (canAttack)
             {
                 print("Attacking you!");
                 moveState = MoveState.Attack;
 
             }
 
 
         }
         else
         {
             moveState = MoveState.Walking;
         } 
                 
         //send move state info to animator controller
         animController.SetInteger("MoveState", (int)moveState);
 
     }
     void OnAnimatorMove()
     {
         navAgent.updateRotation = false;
         //only perform if walking
         if (moveState == MoveState.Walking)
         {
             print("In OnAnimatorMove Function");
             print(navAgent.velocity);
             //set the navAgent's velocity to the velocity of the animation clip currently playing
             navAgent.velocity = animController.deltaPosition / Time.deltaTime;
 
             //smoothly rotate the character in the desired direction of motion
             Quaternion lookRotation = Quaternion.LookRotation(navAgent.desiredVelocity);
             transform.rotation = Quaternion.RotateTowards(transform.rotation, lookRotation, navAgent.angularSpeed * Time.deltaTime);
         }
     }
 
     
 
 }
 

I am getting an error in the navAgent.velocity=animController.deltaPosition/Time.deltaTime; line saying that the navAgent.velocity is NaN

I am not sure what is causing this and need some help.

Thanks