You can see below, the missing back side of the Front Leg. While making changes to a Front Leg Component, some of the faces disappeared, and could not be recovered by the student. I recently received the following model with this face problem. There is no Face command, so you can’t make it happen – you’re reliant on SketchUp to close-up that component. There are just so many things that can affect the “making” of a face. A frequent problem is getting a “face” and a frustration trying to fix it. Periodically, friends and students send me SketchUp projects along with a description of the problem encountered.