Abbreviation for Group Format Error, the absolute nemesis of all Pick machines. The presence of one or more GFE's indicate that the data structure has become corrupted for one of about 20 different possible reasons and that data loss may be imminent. As any true-blue programmer will testify, GFE's are almost always caused by hardware and/or power problems. Generally, the appearance of GFE's indicates that it's time to head for your favorite bar while the local team of witch doctors exorcises your machine. Contrary to popular belief, however, you do not have to do a full restore when these appear. Most of them can be corrected by relatively painless surgical procedures.