"After John wrote a treatise contradicting the normal Church doctrine on transubstantiation, the faculty of the university reported his ideas to William of Baufet, Bishop of Paris, who forbade John under penalty of excommunication to defend such a doctrine, and deprived him of the offices of lecturing, preaching, and hearing confessions.John appealed to the Holy See, but died soon after in Bordeaux, and the case was dropped.