There is no expiration date to that warning and condemnation against division, and those who do it and keep it going. Once one knows the truth of their condition, their own division from the Catholic Church, and it’s condemnation, (seen in scripture and Tradition) and they don’t end their division, then they can’t be saved. That is from scripture and tradition.
846 http://www.scborromeo.org/ccc/para/846.htm .
Catholic Church is used by
St Polycarp, ~140 a.d. Bp Smyrna, disciple of St John called the Church the "Catholic Church"
The Martyrdom of Polycarp http://www.newadvent.org/fathers/0102.htm
Muratorian canon~170 a.d. http://www.earlychristianwritings.com/text/muratorian.html uses authority of “Catholic Church” in determining the canon
Irenaeus ~180 a.d. from Smyrna, became bishop of Lyon, wrote “Against Heresies” he called the Church the “Catholic Church” Adversus haereses [Bk 1 Chapter 10 v 3] http://www.newadvent.org/fathers/0103110.htm . Irenaeus was taught by Polycarp, and teaches all must agree with Rome [Bk 3, Chapter 3, v 2-3] http://www.newadvent.org/fathers/0103303.htm on account of its preeminent authority
Cyprian~250 a.d. calls the Church the Catholic Church Epistle 54 http://www.newadvent.org/fathers/050654.htm
The Nicene Creed, 325 a.d., teaches it’s an article of faith to believe in the “One Holy Catholic Apostolic Church”
Augustine ~395 Saint and Doctor of the Church. There are many other things that most justly keep me in her [i.e. the Catholic Church’s] bosom. . . . The succession of priests keeps me, beginning from the very seat of the Apostle Peter, to whom the Lord, after His resurrection, gave it in charge to feed His sheep, down to the present episcopate. And so, lastly, does the name itself of Catholic, which, not without reason, amid so many heresies, the Church has thus retained; so that, though all heretics wish to be called Catholics, yet when a stranger asks where the Catholic Church meets, no heretic will venture to point to his own chapel or house.Against the Epistle of Manichaeus Called Fundamental (ch 5 v6) http://www.newadvent.org/fathers/1405.htm
The same Church today, Pope Francis is over, 266th successor to St Peter.
Jesus started one Church. The Catholic Church. He gave all His promises to His Church. No one then can argue the HS inspired them to start their own church, and divide from the Catholic Church because that would contradict Jesus prayer. John 17:20-23 http://www.drbo.org/x/d?b=drb&bk=50&ch=17&l=20-23#x
Now there were heresies
Protestantism didn’t come along till the 16th century