Tom,
This even though not too intuitive, sounded like an interesting process where the new file formate would be seen by Windchill as packaged or imbedded within the .asm. I tried what you suggested but unfortunately the file was not there. Odd, though it seems that the file is seen in the workspace in Creo Parametric but not in Windchill. It is like its in purgatory or something :-). Maybe I am missing one more step somewhere. Think just unchecking and saving locally and then uploading as a separate function might be the ticket here. No one stop shop in this one. Its odd because it seems to be stuck in between workspaces somewhere.
-Emil