Bug I keep receiving errors when I look at certain objects with a script on them. Please help.

When trying to get the object name by looking at an object with my interactable script I get this error: "NullReferenceException: Object reference not set to an instance of an object SelectionManager.Update () (at Assets/Scripts/SelectionManager.cs:35).

The code for the line it is saying I am having a problem is is... interaction_text.text = selectionTransform.GetComponent<InteractableObject>().GetItemName();

If anyone has any idea on how to fix this please help

The full Selection Manager script is:

1. using System.Collections;
2. using System.Collections.Generic;
3. using UnityEngine;
4. using UnityEngine.UI;
5. 
   
6. public class SelectionManager : MonoBehaviour
7. {
8. 
   
9. 
   
10. public GameObject interaction_Info_UI;
11. Text interaction_text;
13. 
    
14. private void Start()
15. {
16. interaction_text = interaction_Info_UI.GetComponent<Text>();
17. }
18. 
    
19. 
    
20. 
    
21. 
    
22. 
    
23. void Update()
24. {
25. Ray ray = Camera.main.ScreenPointToRay(Input.mousePosition);
26. RaycastHit hit;
27. if (Physics.Raycast(ray, out hit))
28. {
29. var selectionTransform = hit.transform;
30. 
    
31. 
    
32. if (selectionTransform.GetComponent<InteractableObject>())
33. {
34. 
    
35. interaction_text.text = selectionTransform.GetComponent<InteractableObject>().GetItemName();
36. interaction_Info_UI.SetActive(true);
37. }
38. else //if there is a hit, but without an Interactable Script.
39. {
40. 
    
41. interaction_Info_UI.SetActive(false);
42. 
    
43. }
44. 
    
45. }
46. else //if there is no hit at all.
47. {
48. interaction_Info_UI.SetActive(false);
49. }
50. 
    
51. 
    
52. 
    
53. }
54. 
    
55. }

The full Interactable Objects script is:

1. using System.Collections;
2. using System.Collections.Generic;
3. using UnityEngine;
4. 
   
5. public class InteractableObject : MonoBehaviour
6. {
7. 
   
8. public bool playerInRange;
9. 
   
10. public string ItemName;
11. 
    
12. 
    
13. 
    
14. 
    
15. public string GetItemName()
16. {
17. 
    
18. return ItemName;
19. }
20. 
    
21. 
    
22. private void OntTriggerEnter(Collider other)
23. {
24. if (other.CompareTag("Player"))
25. {
26. 
    
27. playerInRange = true;
28. 
    
29. 
    
30. }
31. 
    
32. }
33. 
    
34. 
    
35. 
    
36. 
    
37. private void OntTriggerExit(Collider other)
38. {
39. if (other.CompareTag("Player"))
40. {
41. 
    
42. playerInRange = false;
43. 
    
44. 
    
45. }
46. 
    
47. 
    
48. 
    
49. }
50. 
    
51. 
    
52. 
    
53. 
    
54. 
    
55. 
    
56. 
    
57. }

 

Hello.
Please edit your post using code tags:
https://forum.unity.com/threads/using-code-tags-properly.143875/
A post on solving your error:
https://forum.unity.com/threads/how-to-fix-a-nullreferenceexception-error.1230297/

 

You NEVER have to post for this error... the answer is ALWAYS the same. ALWAYS!

How to fix a NullReferenceException error

https://forum.unity.com/threads/how-to-fix-a-nullreferenceexception-error.1230297/

Three steps to success:
- Identify what is null <-- any other action taken before this step is WASTED TIME
- Identify why it is null
- Fix that