LinkElement.ByRayBounce node showing Null value

Anyone can tell me why my RayBounce node value showing null?

If the raybounce misses, it should output an empty list.

By any chance, is your active view not a 3D view?

Because you haven’t satisfied all the inputs.

Reviewing the dyn file that was submitted in a different thread.

Your Category and findNearest inputs have Use Default Value disabled (right click the input).

Because they are disabled, you now need an input, as Thomas has mentioned above.