FR 9481 then OS 661 at Vienna
Cologne → Vienna → Warsaw
Timetable, Vienna time
08:55FR 9481 from Cologne at the gate
08:10OS 661 to Warsaw leaves the gate
23 h 15 apart on the timetable, overnight
OS 661 leaves 23 h 15 after FR 9481 arrives on the timetable: more than half a day, so not a connection we count.