Revit will only allow programmatically creating parameters from an external definition, not an internal one. This means that unless there is a user action, all parameters are shared parameters which means no key schedule parameters. This has been the case for awhile now, and as far as I know continues to be this way.
You may be able to create what you need though other methods though. Look into the key schedule nodes in the Archi-lab package.
Ah, shucks - thought Lonrad May have had some black magic. Least it is a one time thing to create (you can transfer the key schedule view next time which brings the parameters with it).
Not asking to be a jerk, but genuinely curious as the benefits of project parameters are significantly less and on one has given a compelling reason for programmatic project parameter creation.
Follow-up question just cause I’m curious and want to understand.
When the current node makes a “project parameter” (shared parameter) does it write a shared parameter text file and store it somewhere? Or does it write it and delete it?
One of the disadvantages of Shared Parameters is that they cannot be purged from a project unless you use Guardian. You can delete the parameter from Project Parameters and you’ll think its gone but its not.
Maybe I’m just being picky, its not consequential to anything (that I’ve noticed yet) just annoying that they don’t purge.
I think I might have a workaround for a project parameter of it is really needed. Note that it will be slow as hell though and will apply to ALL categories unless someone wants to spend a LOT of time making 200+ reference files and 50+ reference files on each annual release… I know I don’t, as the benefit (easier to delete and thereby lose associated data) isn’t worth it.
Thank you for the explanation. Since it deletes it then there’s no impact to file space, so that’s good.
Thank you for looking into it but if its really slow then don’t bother.
That reminds me of a situation I’m currently dealing with. I made a Lateral Tee duct family that populates when 2 ducts are modeled into each other at any angle. There’s over 200 parameters with formulas in the family so any time you click on it, Revit re-calcaluates the formulas. I thought it was special when I made it. Turns out the MEP team only need 45 or 30 degree tees. So even though its a solution for all cases, its a problem for modeling speed.
