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How to report problems productively in the Unity3D forums:
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Finally, this might give you insights:
Some notes on how to fix a NullReferenceException error in Unity3D
- also known as: Unassigned Reference Exception
- also known as: Missing Reference Exception
The basic steps outlined above are:
- Identify what is null
- Identify why it is null
- Fix that.
Expect to see this error a LOT. It’s easily the most common thing to do when working. Learn how to fix it rapidly. It’s easy. See the above link for more tips.