Go.set - Unsupported operation on 'size'?

[defolder]

When you change the size:

function init(self)
    	go.set("/go#background", hash("size"), vmath.vector3(360, 640, 0))
    end

The size has changed but you receive an error. Why?

[Mathias_Westerdahl]

You cannot get the size.
You can set the scale.