EW 7520 then QR 3622 at Barcelona
Hamburg → Barcelona → Nantes
Timetable, Barcelona time
16:20EW 7520 from Hamburg at the gate
10:45QR 3622 to Nantes leaves the gate
18 h 25 apart on the timetable, overnight
QR 3622 leaves 18 h 25 after EW 7520 arrives on the timetable: more than half a day, so not a connection we count.