Assets/AI Scripts/UFO.cs(17,35): error CS1612: Cannot modify a value type return value of `UnityEngi

Assets/AI Scripts/UFO.cs(17,35): error CS1612: Cannot modify a value type return value of `UnityEngine.Transform.position'. Consider storing the value in a temporary variable

What does this error mean and how do I fix it?
Thanks in advanced!

 

You are doing:

Code (csharp):

1. transform.position.x = someNumber;

(or similar)

To fix it:

Code (csharp):

1. Vector3 pos = transform.position;
2. pos.x = someNumber;
3. transform.position = pos;