Normally I straighten a big area and designate that as a landing site.
This time though I wanted to go for a scifi metropolis style city and put the landing site on a platform above my manufacturing building.
That shouldn't be a problem normally, and I guess it isn't. My fault was that I made the area too small.
And now that the trader I requested arrived, they just didn't land and instead kept floating at 127.
I tried to enlarge the area but the trader doesn't seem to care. They keep floating ahead, watching my colonists doing probably important colonist things.
I guess the solution would be to either tell the player that they have no landing site large enough for the trader and simply not sending it, or to let the trader notice when there is a large enough landing site available.
edit: screenshot
