Revit formulas yes/no

[SRobbins1977]

I am baffled. i have 3 yes no formulas. A B and C If one is on I want the others to be off. I tried to make A be the one that is on turning off the others with this formula A = Not (B, C). I am not sure what I have wrong. Please help
Thanks,
~Scott

[davidcobi]

You could try parameters in the attached family. The (shared) parameter "Switch Name" is just there if you want A, B or C to report in a schedule or tag.

[SRobbins1977]

Thanks David. What you showed me worked with out the IF formular. I'm guessing that was for scheduling?
~Scott