"get prospectus" mission can't find/make mission target

[GGgatherer]

Describe the bug

When trying to get the mission, game throws 2 errors:

src/mission_util.cpp:242 [cata::optional<tripoint> find_or_create_om_terrain(const tripoint&, const mission_target_params&)] Unable to find and assign mission target ranch_camp_67.
src/mapgen.cpp:6918 [bool update_mapgen_function_json::update_map(const tripoint&, const point&, mission*, bool) const] Mapgen update function called with overmap::invalid_tripoint

Steps To Reproduce

Load the save, talk with FM gal, try accepting new mission, get error. It's not just cosmetic btw - there is no mission indicator on overmap, looks like it actually cannot generate the ranch (just like it says in error message).

Expected behavior

Ranch generated, mission proceeding as usual.

Versions and configuration

• OS: Windows 7x64
• Game Version: 0.E-1915-g97e3499 [64-bit]
• Graphics Version: Tiles
• Game Language: English [en]
• Mods loaded: [
  Dark Days Ahead [dda],
  Disable NPC Needs [no_npc_food],
  Modular Turrets [modular_turrets],
  Salvaged Robots [Salvaged_Robots],
  Aftershock [aftershock],
  Alternative Map Key [alt_map_key],
  sees-player icon, retrodays [sees_player_retro],
  Stats Through Skills [StatsThroughSkills],
  Magiclysm [magiclysm]
  ]

Additional context

It happens on 10639 as well as 10614.

[cirops]

I have attempted to reproduce this in 10614 and 10639 without any mods and in 10639 with your mods except Modular Turrets, Salvaged Robots (don't have them available by default), and I couldn't reproduce this behavior.
I also haven't been able to use your save file both in 10614 and in 10639 (some error with .sav pops up and bails me).

Perhaps it has something to do with world settings, like big city sizes and small city spacing?

Also, maybe you could try to reproduce it in another world with the same settings and mods? Using the debug features (teleport, invincibility, etc) to get to that point in the questline helps.

[int-ua]

Please comment if it's still relevant and we'll reopen it.

[qaziquza]

I had this same thing happen on the experimental 2024-11-23-0016. Modded playthrough.