How can I import master pages made in FM 2015 into Robohelp 2015 projects for generating PDF documents?
Jeff Coatsworth is the best person to respond so hopefully he will look in. Meantime I'm thinking you would not import a master page, rather a document that uses a master page and the import would handle that link.
Once the RoboHelp topic is created, then you would create the PDF in the normal way.
See www.grainge.org for RoboHelp and Authoring information
The thing is, RoboHelp would not import a master page when importing a FM document. It is stated in the RoboHelp documentation. And as RH is intended primarily for web output, layouts (that is, FM master pages) for PDFs are ignored when import is performed.