[SE5 v1.74] Stellar Manipulation: Sphere World Placement Generator...

It means that the system cannot already contain a sphere world or ring world.

Space Empires Depot | SE:V Balance Mod

However when you build the sphereworld it is likely that the plaanet will be destroyed in the process

I've never successfully built one of these, because of all the hidden requirements. I've tried a few times when a game has lasted long enough that I could delay winning for another year or two to try building one, but have always ended up cussing.

The more recent patches have made more of them clear but here are the requirements I know about:

* Can't be in a multiple-star system

* Can't have any ships or units within 6 hexes of "the star" (not sure if that's the center hex of the system or the star itself) other than the ship doing the construction and the stations with cables and plating.

* Must have the creating device on a ship with movement, 'cause it takes a movement point to use

* The ship AND all the stations with plating and cables, must be in the same hex and that hex must be adjacent to the star when the star is 7 hexes. I don't know if it's really adjacent, or just no more than 2 hexes from the center of the system

why do you think it can only be built when there are no other planets in a six hex area?

not planets colonys in the system, planets within 6 sectors get WIPED OUT only good thing is to have the ships required in the star and NOTHINGelse there not even one more star a good one is find ANY system wipe it clean using star explosion device or black hole destroter etc then create a star and build on that

Actually if you have colonies you can "abandon" them. this is also a good use for those annoying nebula systems.