how do i fix: NullReferenceException: Object reference not set to an instance of an object CityGenerator.CreateCity () (at Assets/materials/city/city generator.cs:64)

Questions & Answers
1

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i got this error when i was typing up a script to randomly generate a city and i got this specific line came up after i clicked on the error “NullReferenceException: Object reference not set to an instance of an object CityGenerator.CreateCity () (at Assets/materials/city/city generator.cs:64)” any fixes for this

2

Do some Debug.Log statements right before the If and find out what is null. It could be “obj”, the Collider on “obj”, or the Collider on “b”.

    //Whichever line prints "true" or causes an error is what's null
    Debug.Log(obj == null);
    Debug.Log(obj.GetComponent<Collider>() == null);
    Debug.Log(b.GetComponent<Collider>() == null);

Once you know what is null you just have to check where you instantiate/set it and make sure it exists.