I am having trouble with booking a reservation for a night train. What does this mean:
Prices unavailable
No price results were found for this connection. It is possible that all pass holder seats are sold out. Please try searching for another connection or check 'More information' and try other ways to book this seat reservation. If no pass holder seats are available anymore you need to buy a separate full fare ticket to board.
As this train have no limit for Railpass holders i guess it´s because the connection between Interrail booking system and Nighttrain booking system doesn´t work :/