Hi

I am trying to book a complex 13-sector LONE3, originating from HEL on Finnair.

I get as far as entering the traveller details, then get:

The following error(s) occured

We are unable to confirm the fare for the flights you have selected. Please choose a different fare or flights and resubmit your request. (15012 - 1009)

Route is:

HEL-HKG-SIN-NRT-(DFW)-ATL-(MIA)-POS-(MIA)-LHR-GYD/overland/AMM-VIE-HEL

(<24hr stop in VIE for the last leg).

There's a couple of codeshares in there if that makes any difference - AB codeshare for RJ on AMM-VIE, and FlyBe for AY on VIE-HEL

Any thoughts?

(EDIT - seems to be getting further in the process if I ditch the RJ/AB codeshare but then I get a ton of extra YQ fuel charge with the RJ code)