OS 764 then FR 1565 at Vienna
Skopje → Vienna → Catania
Timetable, Vienna time
06:05OS 764 from Skopje at the gate
05:55FR 1565 to Catania leaves the gate
23 h 50 apart on the timetable, overnight
FR 1565 leaves 23 h 50 after OS 764 arrives on the timetable: more than half a day, so not a connection we count.