On the first day of the Conference, the Donatists challenged the list of the signatures of the Catholic bishops on the document in which they had assigned their representatives. The roll call followed, in which the tribune Marcellinus, who presided, called the Catholic bishops one by one, and their Donatist counterparts were to identify them. Then the roll call proceeded in the opposite way, with the Donatist bishops identified by the Catholics.

In this case, Florentius, the presbyter of the Church of Macomades, serves in Idassa, where probably the Donatists form the majority: their bishop claims that he has no opponent, and the Catholics acknowledge they are "unable" to ordain a new bishop, probably exactly because of the Donatists' preponderance.