Hey there!

I've created a faction with one group but when I preview the mission ALiVE just keeps informing me that "There are are no groups for OPCOM faction(s) ["alive_zombies_mutants"]! Please check you chose the correct faction(s), and that factions have groups defined in the ArmA 3 default categories infantry, motorized, mechanized, armored, air, sea!"

I've declared the faction and its group in description.ext like so:

//////////////////////////////////////////////////////////////////////////////////
// Config Automatically Generated by ALiVE ORBAT Creator
// Generated with Arma 3 version 184.144923 on Stable branch
// Generated with ALiVE version 1.8.0.1808241
//////////////////////////////////////////////////////////////////////////////////

class CfgGroups {
    class EAST {

        class alive_zombies_mutants {
            name = "Alive mutants";

            class Infantry {
                name = "Infantry";

                class o_ua_infantry_mutants_and_zombies_for_alive {
                    name = "Mutants and zombies for ALiVE";
                    side = 1;
                    faction = "alive_zombies_mutants";
                    icon = "\A3\ui_f\data\map\markers\nato\o_inf.paa";
                    rarityGroup = 0.5;

                    class Unit0 {
                        position[] = {0,0,0};
                        rank = "SERGEANT";
                        side = 1;
                        vehicle = "O_UA_zombie_2_01";
                    };
                    class Unit1 {
                        position[] = {5,-5,0};
                        rank = "PRIVATE";
                        side = 1;
                        vehicle = "O_UA_zombie_03";
                    };
                    class Unit2 {
                        position[] = {-5,-5,0};
                        rank = "PRIVATE";
                        side = 1;
                        vehicle = "O_UA_zombie_06";
                    };
                    class Unit3 {
                        position[] = {10,-10,0};
                        rank = "PRIVATE";
                        side = 1;
                        vehicle = "O_UA_zombie_05";
                    };
                    class Unit4 {
                        position[] = {-10,-10,0};
                        rank = "PRIVATE";
                        side = 1;
                        vehicle = "O_UA_zombie_02";
                    };
                    class Unit5 {
                        position[] = {15,-15,0};
                        rank = "PRIVATE";
                        side = 1;
                        vehicle = "O_UA_zombie_01";
                    };
                };

            };

        };

    };
};

In the mission editor I've placed Military AI commander module and in its Override factions field I've typed alive_zombies_mutants

Then I placed Military placement module and in its Force faction I've typed alive_zombies_mutants
As usual I've synced those two modules together.

Then I go and preview the mission and get greeted with the "There are no groups.." debug information.

Afaik I should have everything set up so what gives? Well.. only thing I haven't declared in the description.ext is class CfgFactionClasses but is that even needed?

Thanks for the quick reply marcel!

I did include the following in description.ext

class CfgFactionClasses {
    class alive_zombies_mutants {
        displayName = "Russia (MSV)";
        side = 1;
        flag = "";
        icon = "";
        priority = -1;
    };
};

but ALiVE still keeps giving the "There are no groups.."

Haven't played in a whe thx to work, just getting back to it so warning: memory fuzzy :)

declaring factions at mission level work(ed) with the limitation that it must use existing units. I made my own RHS "Russian" faction I would include within desired missions. It consisted of all hand made groups populated by RHS, CUP etc soldiers, vehicles etc.