FR 6926 then FR 4545 at Barcelona
Rome → Barcelona → Porto
Timetable, Barcelona time
21:10FR 6926 from Rome at the gate
19:15FR 4545 to Porto leaves the gate
22 h 05 apart on the timetable, overnight
FR 4545 leaves 22 h 05 after FR 6926 arrives on the timetable: more than half a day, so not a connection we count.