Extrude to object cannot complete extrusion

[poporacer]

I have an arch model where I want to add some support "rails" along the bottom and top parts of the arch. The arch will have alignment nubs so that the parts will "lock" in place. I am sure I took the difficult road. I drew the profile to match the Arch and then extruded it to the correct length. Then I created a sketch on the face the is butting up to the alignment nubs with a space for clearance. I tried to extrude the faces to align with the upper portion of the rail and tried to extrude to an object and selected the face of the rail and I get the error. I think it might be because the object face I am selecting to extrude to isn't parallel to the face that I am trying to extrude?

I can extrude it to a distance and get close, but I am wondering if there is a way to extrude this so that it aligns with the edge exactly? Or just get it "close enough"?

Is there a better way to do this to begin with instead of drawing a profile and then adding the "fill"?

[davebYYPCU]

Hide the Hoops, change this Extrude to include the material you are looking for.

Combine > Cut - (keep Tools) the hoops from it, and

then Mirror, will have both the same.

Might help...

[poporacer]

That is easier, the only thing is that the cutouts need to be slightly wider than the arches for clearance. Is there an easy way to do this?

[davebYYPCU · Accepted solution]

Make a dummy wider slot as a solid body,

pattern that with the same spacing as the arches,

use them to cut the slots, and not the arches.

Might help....