Hi Michael,

Let me address some of your responses.

After four straight attempts, I am still getting edges I cannot highlight. I did what you suggested but no joy. I have enclosed a pic of the extrude with the edges I could click on highlighted. The rest of the edges in that pic would not activate. I have attached the file of this latest iteration. The workaround I used was to go back to extrude as I noted here some posts ago. Pics 17 & 18 show the chamfers after the .obj files were dropped into Cinema 4D.

Regarding the "little side connecting edges", I did not include those for the chamfer.

Thanks for the strategic window tip. Good one that will be used frequently.

Regarding the chamfers, I followed BurrMan's suggesting of backing off from .25. The best I could do was .17 and decided to leave it at that. Interestingly, the door rectangular openings accepted the .25 and straight corners just fine.

Thanks for your help.

Leonard