In 596 Sabrisho, an alumnus of the school of Nisibis, was appointed successor of Ishoʿyahb I as Catholicos. He immediately held a synod and anathematized the opponents of Theodore, though he did not mention Henana explicitly. At the same time or sometimes after, Gregory, another alumnus of the school of Nisibis, became Metropolitan of Nisibis, probably chosen by Sabrisho. Gregory first reproached and censored, later condemned the writings of Henana. Henana wrote a defense to Sabrisho that resulted in his excommunication by the other bishops.