I’ve got the academic license 16.1.2d and with simple square example from user manual the option
Mesh->Structured->Surfaces->Assign number of division to surface lines
is not working. After the selection, the lines do not became red indicating the selection, so I can’t mesh the square.
Also, the delete option is not working for surface. When I try to delete the square just created (Delete->Surfaces) again the lines do not became red (none selection is made).