W4 6315 then FR 6973 at Barcelona
Milan → Barcelona → Rome
Timetable, Barcelona time
12:25W4 6315 from Milan at the gate
05:55FR 6973 to Rome leaves the gate
17 h 30 apart on the timetable, overnight
FR 6973 leaves 17 h 30 after W4 6315 arrives on the timetable: more than half a day, so not a connection we count.