Unity3D: NullReferenceException even I have set it in Inspector

Question

I am try to update GUI during Update(). Here is the code:

void Update()
    {
        Debug.Log(HPText == null);
        HPText.text = HP + " / " + MaxHP;
    }

I have already set the HPText through Inspector.

And I get the following in the console. It seems that it keep alternating between null and not null. How can I get rid of the error?

Is it possible you have more than one object running this script? — user585968
– user585968, Commented Aug 19, 2015 at 9:11
The information you have given is not enough. Include more codes from your class like how are you declaring HPText or screenshot of you project hierarchy. — Neeraj Kumar
– Neeraj Kumar, Commented Aug 19, 2015 at 9:49
@MickyDuncan Thanks, you are right. I have 2 object using the same script. I forget to disable the one I am not using. — Joshua
– Joshua, Commented Aug 19, 2015 at 11:12

score 3 · Accepted Answer · 2015-08-19 13:07:48Z

3

Note: This is a summary answer based on my comment above.

Sounds like you have more than one object running this script. Check your scene and remove the script from the second object. One object has the HPText property set, the other more than likely does not.

Thanks, you are right. I have 2 object using the same script. I forget to disable the one I am not using. – Joshua

Alternatively, you could set the HPText on the second object. You mentioned you have since disabled the second object - that works too.

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