How can I make a round look like this?

[RA_9909671]

This part that I'm working on it's looking like this: 

But I don't want that sharped edge, so I tried to round it using "chain", to make it look like this:

But CREO does not accept this format. This message appears:

Is there any way I can make that round, without wrapping the entire line, just that edge?

[kdirth]

A couple of steps to get there.  First under Pieces tab, select Piece1 and drag the drag handle back to the vertex at the edge of the other rounds.

Second, select transition mode, select transition, change transition to Stop at Reference, and select vertex.

[RA_9909671]

Thank you for the tip!

[Patriot_1776]

Why not just radius that edge first?  Do you really WANT that little triangular-ish flat left there?