[Part14]NullReferenceException: Object reference not set to an instance of an ob

[Burhan]

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I have followed the instructions from the tutorial but it seems there is an error like this.

The damage text never shown in my code.

NullReferenceException: Object reference not set to an instance of an object
GameManager+<GenerateFloatingTextCoroutine>d__31.MoveNext () (at Assets/Scripts/GameManager.cs:131)
UnityEngine.SetupCoroutine.InvokeMoveNext (System.Collections.IEnumerator enumerator, System.IntPtr returnValueAddress) (at <cd14705e8f094afcb566740ab5e8c02d>:0)
UnityEngine.MonoBehaviour:StartCoroutine(IEnumerator)
GameManager:GenerateFloatingText(String, Transform, Single, Single) (at Assets/Scripts/GameManager.cs:164)
EnemyStats:TakeDamage(Single, Vector2, Single, Single) (at Assets/Scripts/Enemy/EnemyStats.cs:60)
ProjectileWeaponBehaviour:OnTriggerEnter2D(Collider2D) (at Assets/Scripts/Weapons/Weapon Base/ProjectileWeaponBehaviour.cs:99)

[Terence]

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Hi Burhan, make sure that you have assigned all the new properties on the GameManager.

Failing that, check out this video to troubleshoot your NullReferenceException.

[Burhan]

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I assigned all properties. But I still have same error.

[Lê]

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I have this too

[Terence]

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Burhan, can you double click on the NullReferenceException in your Console? This should bring you to the line of code that is the issue on Visual Studio. Screenshot that and show me what line it is.

[Terence]

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You can also check out this topic and see if it helps: https://blog.terresquall.com/community/topic/part-14-missingreferenceexception-with-floating-text-recttransform/

[Burhan]

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I get error in line 131.

[Terence]

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Burhan,

Add the following lines above line 131, run the game, and show me the result on the Console.

Debug.Log("textObj: " + textObj);
Debug.Log("instance: " + instance);
Debug.Log("damageTextCanvas: " + damageTextCanvas);

One of your variables on Line 131 is null, and that is what is causing the null reference.

[Burhan]

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[Terence]

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Burhan, I found the issue. You have an extra portion in your code:

textObj.transform.parent.SetParent(instance.damageTextCanvas.transform);

textObj has no parent, so when you try to access its parent, you are essentially doing null.SetParent(), which is what causes the code to fail.

[Burhan]

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Thank you, problem solved.

[Terence]

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No problem Burhan.

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