Did you add Interrail as a discount and select one-way tickets? It should work that way.

EDIT : looking at tomorrow these trains are sold out in 2nd class. Either you take an earlier train or the night train (seat only left).

Yes, not I’m not can buy Venezia to Roma 

Have a look at my edit above.

I'd suggest taking the hourly reservation-free regional train to Bologna and then the Frecciarossa. For example:

- RV Venezia S. Lucia - Bologna Centrale 18:40 - 20:46

- time for a quick dinner ;)

- FR Bologna Centrale - Roma Termini 21:27 - 23:49 13€

Ok, im understand, im see

Not available ( 24.04

The night train isn't available on ÖBB. ItaliaRail should work but it would mean the night on a seat (avoid it).

Otherwise look for Bologna - Rome: there are multiple departures between 7 and 9pm. 19:37, 19:47, 20:27, 21:02,...

What about this, if im going from Roma to Wien, what ticket is better? I want 2-3 passengers

The 89.90€ fare is the one you want. You might have to share with max 2 other people (same gender) but the beds could remain empty if you’re lucky! Looks like the train isn’t too busy on your date.

A 4 people couchette compartment would cost 59.90€ → you might have to share with max 3 other people (any gender).

Thank you very much, but how can I print a ticket if I’m not in Austria, do I need to give it to the conductor?

Please define "better”. Is that cheaper, more space, something else?

You've chosen a sleeper. Couchettes should be cheaper. In any case, you need the middle column. Cheapest sleeper is €89.90 in this train.

You’ll receive a PDF by email. It’s true that night train attendants usually like to keep the reservation with them → maybe you can print it at your accommodation in Rome or in Verona/Venice ?