Hello Marco,
why do you use Automatic creation of the wire?
Which kind of indicator are you using for displaying the output data?
Be careful, the output of the function is a cluster, so be sure to use a same type cluster indicator. You can create an indicator directly from the block diagram: right click on the output, Crate -> Indicator.
I hope my answer can help you.
PS: my suggestion is to post the questions on the italian forum because it takes twice as much to understand the question if it is written in a not good english.
Kind regards.
Pep