How to prevent the mission from failing when all human players leave the server?

[alleycat 28]

How to prevent the mission from failing when all human players leave the server? I am trying to get spectator modes to work by having dead players rejoin as moderators. However when all humans leave, it ends the missions. How to turn that off? The mission is a basic ZEUS enabled gamemode setup

[IT07 10]

Make sure the server.cfg has persistent = 1; in it. Then the game will continue even if there are no players in.

[alleycat 28]

Thanks, however using a different respawn setting, like INSTANT or BASE seems to fix it.