The Display Classes, Area Classes and Part Families are not shown in various tools (e.g. Shape, Plate/Polyplates etc.) dialog before insertion of the elements as well as in the PS Properties on Partlist Data > Assignment page.
Display Classes, Area Classes and Part Families does not have any entries in the respective tools dialog.
1. Open Display Classes, Area Classes and Part Families dialogs one by one.
2. Double click Class Name or Description and give a name to at least one Display Class, Area Class and Part Family and click on the OK button.
3. Now, Display Classes, Area Classes and Part Families are shown in all the tools dialog while inserting the elements as well as in PS Properties.
In this way, one can resolve this problem.