this is the REVIT NORM,... you create something, want to write a small formula, then revit says
"A reporting parameter can be used in a formula only if it's dimension references are all to host elements in the family"
how many host elements are there, to dimension to in a family template??
for a Door / Window template,.. you have Width / Height / Host thickness that you can dimension too,
Width and Height are already type parameters,.. so we don't need them.....
seems the only reporting parameter that can now be used, is host thickness
so, one has to start writing long formulas, as a work around.
it's a REPORTING Parameter (which means it just reports values????? or NOT)
why can't we use these reporting parameter values for formulas???