If statement for family type parameter

[Sujan.Maharjan]

Hi,

I'm trying to use an if statement for a Generic Annotation Type parameter value to a Text type parameter. But I'm getting errors. Can anyone explain what am I doing wrong?

Thanks, 

[ToanDN]

You cannot use a family type parameter to drive a formula.

[Sujan.Maharjan]

Thanks for confirming.

[J.Wehmer]

You can use a formula to drive a <Family Type> parameter. I taught a class about it at MU19, attached is a family for you to dissect and see how to reference the interties in a formula.

To drive a <FT> parameter with a formula you have to reference other <FT> parameters. You cannot reference any other format of data (length, dia, flow...), it HAS to be a <FT> parameter.

DM me if you would like the handout from the class and any other material that might help

[patil.vaishali]

You can use Type parameter in formula. Your "Type of parameter" i.e. Length, Integer, Number... should be same as main parameter for which you are using the formula to drive that parameter.

[nuno.magalhaes.estudo.revit]

Hi,

I have the same problem

I want to associate a parameter call Caixa, that I has to have a value related to the type of familie.

I create a text parameter: Tipo = "2x08M". I have various family type parameter with: Caixa208, Caixa216, ...

And I have familytype parameter names Caixa that has to be the value of Caixa208 for Tipo"2x08M, Caixa 216 for Tipo"2x16M", etc.

A put this formula on Caixa:

if(Tipo="2x08M",Caixa218,if(Tipo=2x16M",Caixa216,""),"")

 I have the same error. There is a way to solve this?

[fabiosato]

Hello,

AFAIK familytype can´t be used in formulas.

[petrlanik]

Why does Revit has so many limitations? -It can probably be done in Dynamo, but it is quite annoying. Also the possibility to drive parent parameters by nested family parameters would be great. Again probably Dynamo script will solve that, but still it is quite annoying.

[kclarkQEJDP]

I need help with a door family that might change sizes and the width of the door panel is a manual entry, I want the window in the door to know what size to be based on which type of door type I am placing. Can you help? this is my thought, If door panel is set to Family Type, Single Vision Lite, then set window width to be 7", else if the Family Type is set to Single Half Lite, then set the Window width to be the Door Panel minus 11".
My main issue is I need the door panel to be changeable and the stiles to automatically go to the proper width from the outside edge. Can you help?