Sure, but you have to tell creo how to treat the inner volume.
See one possibility in the attached video.
(Sorry, it seems as if I'm to stupid to insert a video.)
In Creo 3.0 there is new enhancement Fill Loops in Parting Surface, please refer to http://learningexchange.ptc.com/tutorial/3465/creating-a-parting-surface-using-fill-loops for detail.
hmm...interesting..yeah i know if license is not there it does not go in the style module...but functions deactivated..that's surprising...
Meh, lost my nerve near the end so if you can finish it cool.
Btw in Creo 3 we can fill holes when copying quilt but not that complex.
NX fill is real nice but in this case still gives less then perfect fill.
No, in my opinion there is not enough data there for the engine to figure out how to fix it. And I would guess there aren't any that would get it 100% right. Close, like the NX picture and some of the ones people drew, but not 100% correct.
And between creo 1,2, and 3 functionality, stuff like that is not coming any time soon, I don't feel like the 3d engine is advancing at all.
I don't have the mold tool or advanced surfaces. I tried with the older tools including the n-sided surface. It just doesn't like that geometry. Even if I make boundary blends to some logical connections with datum curves, tangent and all, the boundary blends don't want to fill tangent regardless of accuracy settings. Accuracy too high, and you get 28 problem vertices and 5 bad edges. Set it low and you can get a fill, but little to no tangency control.
Sorry, but nothing is done.
It's the same solution, as I have shown above, using other curves (without tangent).
The hole could have been filled very easy by a simpel profil (magenta).
Then everybody knows, that he has to check the contur of the channel (green).
There ist only one person who can fill this hole correctly: the original designer of this part.
It appears that even the original geometry (pre-drilled) was a bit cobbled. However, it is sad that core Creo cannot put a simple patch with tangency in place. Maybe a shrinkwrap with the hole excluded?
I'll give you that one.
I had a little luck with a boundary blend by recreating the existing surfaces and getting tangency.
The problem is getting control of the flow lines but it is possible if you play with the control points.
In this case, I added 3 sets of control points, the 3rd of which I added in the fly. Once you get the dialog under control, it goes pretty well, but the preview doesn't work so you have to wait until you close the feature to see what it did.
Since the shape is a guessing game anyway, you can probably make something work along these lines. I'd say that adding flow line points prior to the boundary blend will help that process immensely.