Hi all; I just wanted to check whether there is any issue with having unconnected journeys on your pass e.g train from Nice to Genoa, and then next journey Milan to Venice? 
Between Genoa and Milan we might get a different form of transport to save travel days. Will that be an issue?

also does it matter if you have whole country gaps? E.g. travel days get you to Greece then your next train is in Spain (after flying)?