Brep has null reference

[cervellione]

when using brepbuilding i can build a valid brep and access the face, but let's say for each DB.Face f in the brep f.Reference is always null. any ideas on how to obtain a valid reference. i am trying to use it to create a facewall

[jeremytammik]

I believe the reference can only be determined by Revit once the face belongs to a valid database element.

I do not believe you can get a reference for a face that you have built yourself.

The purpose of the reference is to provide a valid persistent tag for a geometric sub-element of a database resident BIM element.

[Anonymous]

thanks for the reply. 

I know dynamo can do it and i am going through the source to figure out how. there is a wall by face component that accepts a surface, but the surface is just a dynamo surface yet is able to generate a proper reference to pass the facewall method. perhaps there is a better way to make a wall by face other than the facewall method?