Question Heuristic function not called.

I installed MLagents on macox and I can run mlagents-learn without errors. I added the following script to the agent and in the Behavior Parameters I set Heuristic Only. However, the Heuristic function is not invoked. Someone can help me?

Code (CSharp):

1. using System;
2. using System.Collections;
3. using System.Collections.Generic;
4. using Unity.MLAgents;
5. using Unity.MLAgents.Actuators;
6. using Unity.MLAgents.Sensors;
7. using UnityEngine;
8.  
9. public class MoveToGoalAgent : Agent
10. {
11.     [SerializeField] private Transform targetTransform;
12.     [SerializeField] private float speed = 3f;
13.  
14.     public override void CollectObservations(VectorSensor sensor)
15.     {
16.         Debug.Log("CollectObservations");
17.  
18.         sensor.AddObservation(transform.position);
19.         sensor.AddObservation(targetTransform);
20.     }
21.  
22.     public override void OnActionReceived(ActionBuffers actions)
23.     {
24.         Debug.Log("OnActionReceived");
25.         float moveX = actions.ContinuousActions[0];
26.         float moveZ = actions.ContinuousActions[1];
27.  
28.         transform.position += new Vector3(moveX, 0, moveZ) * Time.deltaTime * speed;
29.     }
30.  
31.     public void OnTriggerEnter(Collider other)
32.     {
33.        
34.         Debug.Log("OnTriggerEnter");
35.         if (other.TryGetComponent<Goal>(out Goal goal))
36.         {
37.             SetReward(1f);
38.             EndEpisode();
39.         }
40.         if (other.TryGetComponent<Wall>(out Wall wall))
41.         {
42.             SetReward(-1f);
43.             EndEpisode();
44.         }
45.     }
46.    
47.     public override void Heuristic(in ActionBuffers actionsOut)
48.     {
49.         Debug.Log("Heuristic");
50.         var continuousActionsOut = actionsOut.ContinuousActions;
51.         continuousActionsOut[0] = Input.GetAxisRaw("Horizontal") ;
52.         continuousActionsOut[1] = Input.GetAxisRaw("Vertical");
53.     }
54.  
55.    
56.     public override void OnEpisodeBegin()
57.     {
58.         Debug.Log("OnEpisodeBegin");
59.         transform.position = Vector3.zero;
60.     }
61. }
62.  

 

Just a guess, but do you have a decision requester on the agent?