Unable to spawn any VC and NVA infantry red groups in SOG Prarie Fire, using this command:
BG100 = [getPos EDEF, side BG1, (BG100 = [getPos EDEF, side BG1, (configfile >> "CfgGroups" >> "East" >> "VN_VC" >> "vn_o_group_men_vc" >> "vn_o_group_men_vc_01"),[],[],[],[],[],180] call BIS_fnc_spawnGroup;
Aircraft won't spawn as well.
I make my own single player scenarios and I use the above command extensively to distribute newly spawned red units.