: wrote : this doesn't change the display of a model tree column displaying the : parameter : (I don't think!) : Yeah, Pro/e's goofy that way. It assumes that, if you'd wanted the parameter to change, you'd have changed the model in some way that would have effected the mass. So, do what it wants (or something like it, such as) suppress a feature and resume it. This should cause a recalc of mass in your relation, and so, in the drawing note that uses that parameter.
If this doesn't work, I've got another method that's less goofy.