Hi I am checking this out ... From initial invesitgations it would seem that only the chnage size / change spec will work. Update Components will only update the text of the spec and not the actual spec.
Of course .. if you are only updating the isometrics ... and these are in AutoCAD ... you could write a lisp or VB app which renames the text .. and setup a batch to do this.
If you are wanting to update the 3D model ... I will get back to you.
Glen Worrall
Bentley Systems
Late but someone may have use for this. I would remap isogen to read the spec from the process table and edit the value there. The model will still have the wrong spec name but the iso will have the correct name so up.