When I use the iMPACT GUI to generate PROM files for revisioned PROM, the Percent Full listing is not reduced if a revision is deleted. The percentage full reading of the device increments as design files are added, but it is not reduced when revisions from the PROMs are deleted.
To work around this problem, re-generate the PROM files from the GUI without over-extending and then deleting revisions.
This problem is fixed in Service Pack 2.