External faces issue when adding objects to an extrusion


#1

This seems so simple, but I can’t make it work. I have extruded a rectangular frame. When I try to add parts to the side of the frame, the inspector tells me there are external faces. When I tell the inspector to fix the problem, some parts are removed from the drawing. . I am using SketchUp 16 but get the same results in SketchUp 17.
Unfortunately there is no way to post an image to this post to make it more clear.


#2

Use the upload button on top of the message window, 7th icon from the left, to upload images or models. Or even just drag and drop onto the message window.