Ok, I'm afraid I had to guess a bit here, as I can't find any doco on this command line option.
looked like it almost might have worked if I had any idea what I was supposed to be putting the ssl-host field.
I'm trying to assign a custom domain to the application, we've already done a CNAME mapping from the DNS config of the domain to point a subdomain to hana.ondemand.com, but again that was guess work, really not a huge amount of doco that I can find (as in none) to help here.
Cheers!
Chris