I WANT TO CREATE A CHAMFER DIMENSION, BUT WHEN I SELECT THE CHAMFER, THE WINDOW ALERT SAYS: IS NOT POSSIBLE CREATE THE CHAMFER WITH THE EDGE SELECTED. PLEASE SELECT ANOTHER EDGE.

Obviously, i can put a note, but i want to know, why is not possible créate this chamfer, and not only chamfers. also circles and radius..

THANK YOU MY FRIENDS

THANKS