Face disappears in Shaded/Rendered modes

[Kim29 (Kim)]

After doing a boolean difference, I noticed that the face of the difference part shows transparent. Unfortunately, the Boolean diff was done awhile back, so I have no way of resurrecting the old piece to try again. I have spent this morning with Gemini to try and fix the problem, going through all of Gemini’s suggestions, no luck. Is there anyway I can fix this problem?

Thanks

Dissappearing Faces.3dm (3.2 MB)

[theoutside (Kyle Houchens)]

that is likely a degenerate surface of some sort.

run selbadobjects and see if that part lights up. if it does, run extractbadsrf and remove it from the model. repair the flaw with your tools of choice.