migration from RN 6.5 to Rn 7.1.1

While migrating from IS 6.5 to IS 8.0, i tried to import the RN process models from 6.5 to 8.0 using designer. But most of these models failed while generating complaining about OR or COMPLEX conditions.

PDF says to import the RN process templates and create version based on the templates.

is it possible to import these RN models directly from 6.5 to 8.0 ?

That will not work