EC 3749 then FR 6927 at Barcelona
Milan → Barcelona → Rome
Timetable, Barcelona time
21:30EC 3749 from Milan at the gate
16:00FR 6927 to Rome leaves the gate
18 h 30 apart on the timetable, overnight
FR 6927 leaves 18 h 30 after EC 3749 arrives on the timetable: more than half a day, so not a connection we count.