A council at Ansa in southern Gaul nevertheless condemned Odilo's position because it claimed that the Council of Chalcedon (in 451) had decreed that the ordination of monks had to occur with diocesan consent. In answer to this, the Pope then wrote letters to various parties involved with the dispute and condemned Gauzlin's position. The Pope further decreed that any bishop who tried to enter a Cluniac monastery to even celebrate a mass would suffer automatic excommunication, unless he had been invited by the abbot. The dispute when on for years.