No suitable method found to override

Hello. I tried to make a new environment for ML-Agents, but after writing a code, the errors happened :
'AgentControl.Heuristic(float[])': no suitable method found to override
'AgentControl.OnActionReceived(float[])': no suitable method found to override

I'm using Unity 2019.4, ML-Agents 2.0.0 exp-1.
My code is below:

Code (CSharp):

1. using System.Collections;
2. using System.Collections.Generic;
3. using UnityEngine;
4. using Unity.MLAgents;
5. using Unity.MLAgents.Sensors;
6. using Unity.MLAgents.Actuators;
7.  
8. public class AgentControl : Agent
9. {
10.     public Transform target1;
11.     public Transform target2;
12.     public Transform target3;
13.     public Transform target4;
14.     Rigidbody rBody;
15.     private bool onEpisode = false;
16.     private string closestTarget;
17.  
18.     public override void Initialize()
19.     {
20.         this.rBody = GetComponent<Rigidbody>();
21.         onEpisode = false;
22.     }
23.  
24.     public override void OnEpisodeBegin()
25.     {
26.         this.rBody.angularVelocity = Vector3.zero;
27.         this.rBody.velocity = Vector3.zero;
28.         this.transform.rotation = Quaternion.identity;
29.  
30.         this.transform.localPosition = new Vector3(Random.Range(-14.0f, 14.0f), 0.5f, Random.Range(-9.0f, 9.0f));
31.         onEpisode = true;
32.  
33.         float dis1 = Vector3.Distance(this.transform.localPosition, target1.localPosition);
34.         float dis2 = Vector3.Distance(this.transform.localPosition, target2.localPosition);
35.         float dis3 = Vector3.Distance(this.transform.localPosition, target3.localPosition);
36.         float dis4 = Vector3.Distance(this.transform.localPosition, target4.localPosition);
37.  
38.         float leastDis = Mathf.Min(dis1, dis2, dis3, dis4);
39.  
40.         if (leastDis == dis1) closestTarget = "Target1";
41.         if (leastDis == dis2) closestTarget = "Target2";
42.         if (leastDis == dis3) closestTarget = "Target3";
43.         if (leastDis == dis4) closestTarget = "Target4";
44.     }
45.  
46.     public override void OnActionReceived(float[] vectorAction)
47.     {
48.         Vector3 dirToGo = Vector3.zero;
49.         Vector3 rotateDir = Vector3.zero;
50.  
51.         int action = (int)vectorAction[0];
52.         if (action == 1) dirToGo = transform.forward;
53.         if (action == 2) dirToGo = transform.forward * -1.0f;
54.         if (action == 3) rotateDir = transform.up;
55.         if (action == 4) rotateDir = transform.up * -1.0f;
56.  
57.         this.transform.Rotate(rotateDir, Time.deltaTime * 200f);
58.         this.rBody.AddForce(dirToGo * 0.5f, ForceMode.VelocityChange);
59.  
60.         if (this.transform.localPosition.y < 0)
61.         {
62.             AddReward(-0.3f);
63.             EndEpisode();
64.         }
65.  
66.         AddReward(-1.0f / MaxStep);
67.     }
68.  
69.     public void OnCollisionEnter(Collision collision)
70.     {
71.         if (collision.gameObject.tag == "target")
72.         {
73.             if (onEpisode)
74.             {
75.                 if (collision.gameObject.name == closestTarget)
76.                 {
77.                     AddReward(1.0f);
78.                     EndEpisode();
79.                 }
80.  
81.                 else
82.                 {
83.                     AddReward(0.3f);
84.                     EndEpisode();
85.                 }
86.  
87.             }
88.             else
89.             {
90.                 this.transform.localPosition = new Vector3(Random.Range(-14.0f, 14.0f), 0.5f, Random.Range(-9.0f, 9.0f));
91.             }
92.         }
93.     }
94.  
95.     public override void Heuristic(float[] actionsOut)
96.     {
97.         actionsOut[0] = 0;
98.         if (Input.GetKey(KeyCode.UpArrow)) actionsOut[0] = 1;
99.         if (Input.GetKey(KeyCode.DownArrow)) actionsOut[0] = 2;
100.         if (Input.GetKey(KeyCode.RightArrow)) actionsOut[0] = 3;
101.         if (Input.GetKey(KeyCode.LeftArrow)) actionsOut[0] = 4;
102.     }
103. }

Could you help me?

 

Thank you! I understand "override" is no longer used in this method.
This is the first time ML-Agents upgrade for me, so I will check there next time.

 

hello, i've changed 2 lines

• Agent.Heuristic(float[] actionsOut) --> Agent.Heuristic(in ActionBuffers actionsOut)
• Agent.OnActionReceived(float[] vectorAction) --> Agent.OnActionReceived(ActionBuffers actions)th

these 2 errors appear:

Assets\Hummingbird\Scripts\HummingbirdAgent.cs(116,43): error CS0246: The type or namespace name 'ActionBuffers' could not be found (are you missing a using directive or an assembly reference?)


Assets\Hummingbird\Scripts\HummingbirdAgent.cs(192,39): error CS0246: The type or namespace name 'ActionBuffers' could not be found (are you missing a using directive or an assembly reference?)

Any help please?

 

Thank you

 

Thank you!
I just faced the same issues, and just fixed it by downgrading the package to https://github.com/Unity-Technologies/ml-agents/releases/tag/release_1

 

it says "Cannot apply indexing with [] to an expression of type 'ActionBuffers'" I only used [] in actionsOut[0] and actionsOut[1]. send help please.

 

Hello everyone!

Versions:
ml-agents (python package): 0.28.0
ml-agents-envs (python package): 0.28.0
Unity Package Manager package: ML Agents 2.01
======================================
Errors #1:
Assets\Scripts\BounceAgent.cs(30,25): error CS0115: 'BounceAgent.OnActionReceived(float[])': no suitable method found to override

&

Assets\Scripts\BounceAgent.cs(49,25): error CS0115: 'BounceAgent.Heuristic(float[])': no suitable method found to override
=========================================================================================
I understand that this code is deprecated - but when I change it to OnActionReceived(ActionBuffers actions) or Heuristic(in ActionBuffers actionsOut), I get the following error:

Error CS0021 Cannot apply indexing with [] to an expression of type 'ActionBuffers'

This is because I have not declared an array - but when I do declare an array, I get the following errors:

Error CS1503 Argument 1: cannot convert from 'Unity.MLAgents.Actuators.ActionBuffers' to 'float'

&

Error CS0029 Cannot implicitly convert type 'Unity.MLAgents.Actuators.ActionBuffers' to 'float'

&

Error CS0019 Operator '*' cannot be applied to operands of type 'ActionBuffers' and 'ActionBuffers'

I don't know how to change ActionBuffers to a float...(or if that would help)...

I tried downgrading my packages, but after 3 days I ended up getting everything back, so I'm not going to use that option. Here is a screenshot of the problematic code...




Any help would be much appreciated!