I've tried it by myself -> no problem i select 64Sqn early and get this, so moggel seems to make a mistake
Code:
GamePlay.gpLogServer(null, "GroupName: {0}", new object[]{(actor as AiAircraft).AirGroup().Name()});
gives
GroupName: 1:BoB_RAF_F_64Sqn_Early.01
Code:
GamePlay.gpLogServer(null, "RegimentName: {0}", new object[] { (actor as AiAircraft).Regiment().name()});
gives
RegimentName: BoB_RAF_F_64Sqn_Early