Seems like if it's just a single protrusion, you could "Redefine" it, get into the sketch, save the sketch in its own file. Then start up a new part, create a protrusion feature, then import that saved sketch. It'll likely be dimensioned crazily with whatever screwball scheme Creo decides, but you can fix that and move on.
Here is another way:
In Reply to David Haigh:
I pulled up an old part that has no features other than a single protrusion. It has references to an assembly that no longer exist. I can't break the references unless I can reroute the sketcher orientation picks.
I know this used to be possible. Don't know how in Creo. Anyone?
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David Haigh
Phone: 925-424-3931
Fax: 925-423-7496
Lawrence Livermore National Lab
7000 East Ave, L-362
Livermore, CA 94550
Simon Lucas