MCServer private dev survival server?

[tigerw]

The believe internal CreateAndInitializeWorld usage will cause blocking of the tick thread presently, so that's the main problem with it.

NetherWorldName is used by the Overworld to know which nether file to link to when travelling through a portal.
OverworldName is used by the Nether to know which overworld to link to when going back.

Suggestion is to temporarily disable the deadlock detector and go through a portal to let the nether generate. Everything then should work from there.