Non persistent data in MVC tree

Hi,

I am currently trying to add a non-persistent column to a tree in Windchill. The column does not represent an attribute, but a value calculated in the buildComponentData method.

As I haven't figured out how to only add one non-persistent column, I currently build a component filled with non-persistent data instead. This works great when the component is a table, but when trying to do so with a tree, I get a "Unable to find NmObject for element: ..." error. This seems to me as if the tree component cannot display non-persistent data.

Does someone know if a tree component can display non-persistent data and if so, what are the differences between a table with non-persistent data and a tree with non-persistent data?

Thank you,
Vincent