FR 4596 then FR 6927 at Barcelona
Porto → Barcelona → Rome
Timetable, Barcelona time
00:50FR 4596 from Porto at the gate
13:05FR 6927 to Rome leaves the gate
12 h 15 apart on the timetable
FR 6927 leaves 12 h 15 after FR 4596 arrives on the timetable: more than half a day, so not a connection we count.