FR 2331 then FR 4545 at Barcelona
Nador → Barcelona → Porto
Timetable, Barcelona time
15:10FR 2331 from Nador at the gate
10:20FR 4545 to Porto leaves the gate
19 h 10 apart on the timetable, overnight
FR 4545 leaves 19 h 10 after FR 2331 arrives on the timetable: more than half a day, so not a connection we count.