Thanks, Brian
Yes, it is true that Pro/E doesn't need the relation, but you can't use
internal parameters like Pro_mp_mass in Intralink - Ilink doesn't know
about them, so you have to create an explicit parameter and designate it.
That's assuming you want to use it Ilink, of course. We just decided to
make all our parameters Ilink compatible, just in case we should ever need
to use them.
Regards,