Hello It's written in the presentation of 3.0.4 : Update CrossEPG to support new Rytec xz compression XMLTV listings with a vu+ duo2 it's true, crossepg load .xz providers but seems ultimo can't load it. (update made) Can you confirm ?
I found the solution here ! http://www.vuplus-community.net/board/threads/epg-not-working.34492/page-2#post-239732 Thank you Matrix10