Warning: Element.SetParameterByName operation failed.
The parameter’s storage type is not a string
Did you ever see a list with green items next to the listes items?
Its the Id.
You need to feed in one of those.
Change the list input of the List.GetItemAtIndex to be the output of the All Elements of Type Node and you should be all set. Structural Material requires an element for the value, not a name.
ok Thank you solved
You are feeding in a string in the value port.
You should use the Id of the material.