@HeroesandvillainsOS  In one of the shots you've written BLUE_F

I'm fairly certain that is not a correct faction name (though I don't pretend to be an expert on vanilla factions). Try BLU_F (which is NATO) instead and let me know if that fixes your problem and gives you the desired result.

That was the problem. I was using wrong faction names or unsupported ones (looks like al factions from CUP aren't available yet). Thanks for the help!

In this case NATO vanilla forces. Here are some screenshots of the mission (the interface is in spanish). https://drive.google.com/open?id=0B70pNz1wn_8ienFPQWNCeldUZlk

In this mission in not seeing any errors but in another one in chernarus I was getting a "there are no groups for opcom factions" or something like that.

I'm getting the same error but I can only spawn CSAT units, no matter what faction name I assign it the faction field. I try CUP factions, RHS factions and vanilla factions and none of them work. I'm new in editing in ALIVE so maybe there is something I'm doing wrong but I downloaded a example mission on stratis and edit it and works well. I also try editing a basic mission in my brothers computer that uses the same mods that I use and doesn't work.

Here is the link to a basic mission using only ALIVE and CBA mods that has the error: https://mega.nz/#!G1pTTKKR!r4GqVc8BKNtMG9p7JAlqVU6yJ1U16jr7mqg0U2fEIGo

I'm doing something wrong?