What files needed for adding region?

For some background, I am trying to move a map from one mod to another.
The names for the offending region that show in the syslog are spelled the same in the descr_regions.txt, imperial_campaign_settlements_and_regions.txt, descr_strat.txt, and the descr_mercenaries.txt. I made sure the RGB match in the descr_regions.txt and the maps_regions.tga. I deleted the map.rwm.

Is there something I missed to cause this kind of error?

Thank you.

While I'm certainly no expert on this, do check descr_win_conditions, disasters.tga, and campaign_script.
Those reference regions and the map as well I think.

Also, descr_strat places resources and units at certain coordinates or settlements.

This will tell you how long it's been since I tried this. I forgot to delete the imperial_campaign_regions_and settlements.strings.bin and let it generate a new one. One problem solved.