Unless you have reservations for the 09.52 you cannot take it as it is reservation compulsory.

Alternatives not requiring reservations are at 08.45 - 11.35 or 09.45 - 12.35.

I don’t know why you are seeing “not in pass network” as this is incorrect for that service.

Have you updated your app?

Okay I will check the app or choose a different time. Thanks for responding 

Al_G it says supplemental required for the 8:45. Is this true? I was previously told I wouldn’t need to reserve a seat during this time. 

No, ignore this, it is incorrect and shouldn’t display on the app.

A supplement is required for some tickets but this does not apply to any Interrail/Eurail passes as they are international tickets.

Okay thank you.