Post: #6

to enable heaven you must choose the best one that match your server

old Haven (AOS/SE): it's the first haven, a huge island with a city on center.
It can be enabled on Trammel (map1) using map0+mapdiff, so you must set "UseMapDiffs=1" on sphere.ini (you can enable/disable Haven at any time using this setting). Only AOS/SE client installation can see it

New Haven (ML+): On UO ML launch, they made an quest where monsters destroyed Haven and after that villagers created a New Haven.
Since ML (client 5.0.0), the map1 now uses dedicated map1 files instead use map0+mapdiff. So the New Haven is permanently enabled and the "UseMapDiffs" doesn't have any effect. Only works with ML+ client installation which has these new files

PS: both Havens exists only on Trammel facet (map1)