Can't chamfer edge...

Try to chamfer edge on left side of 3D solid and get message:

Modeling Operation Error:

Chamfer case not implemented.

Failed to perform blend.

Failure while chamfering.

I am starting adventure with 3D, did something but this make me wonder if it is imposible or just poor operator???

BTW: chamfer is 3/4"@ 45 deg

Chamfer.dwg

if u can't get the result with chamfer, copy edge u want, sweep (or extrude, or loft, use whatever to get the result) along that edge, and finally substract it from the original solid.