Daniel,
check out these links.
http://scn.sap.com/docs/DOC-69628
http://scn.sap.com/community/bw-hana/blog/2015/03/24/s4hana-and-bwonhana
http://scn.sap.com/community/bw-hana/blog/2015/04/13/s4hana-and-data-warehousing
regards,
Mauricio Cubillos