Project Params Created Identical, one will go in formula, the other NOT

[mdhutchinson]

I have two project parameters I am referencing in formula intended to drive Yes/No Visibility Parameters...

Both referenced parameters have been created the same way. Additionally, the Visibility Parameters have also been created the same way... both are Yes/No grouped under Visibility. 

One (Ceiling Elevation) I can reference in the formula without error... the other (Floor Thickness) I cannot.  I've checked, rechecked and recreated the troubled parameter, but still cannot resolve the issue.

Can anyone give me a clue what I might look at?

[cbcarch]

Well, I thought maybe I was onto something?

Post 2 of 20 above...

"Just a guess, but perhaps it could be a "conflict" between a Project Parameter and a Shared Family Parameter ( Floors and/or Rooms?)."

[barthbradley]

I think we've all been on to something.  Looks like the OP may be as well.  I can feel the revelation coming...

[mdhutchinson]

So... is it a limitation of Revit to be able to toggle (Yes/No) Visibility state of a Label within a Tag... solely based on the Boolean result of a formula? 

[Anonymous]

I think the issue is you have everything instance based....usually with tags they don't work automatically switching from one to another and need to be Type based.  With Dynamo being involved it is forcing the change, but perhaps Revit doesn't like it?