Element Catergory report "null"

[toantrunggtvt]

I don’t know how node “Element Catergory” report noll. Some one can help me? Thank you!

[cnealy]

@toantrunggtvt You need to input an element into that node, currently you’re feeding an element category.
Based on what I can tell you’re trying to do, delete that second Element.Category node and feed in the Select Elements output into the List.GetItemAtIndex list input.

[toantrunggtvt]

Like that Sir? But not ok.

[toantrunggtvt]

Thank you Sir!!! I can do it!

[cnealy]

[cnealy]

Perfect, I was too late on the reply. Glad I could help! Remember to mark the solution with the checkbox to indicate this post is solved

[toantrunggtvt]

Thank you Sir!!! Have a nice day!!! Good luck! Thank you so much!!!