For people writing scripts meant to be played in multiple different modded solar systems (i.e. RSS versus Stock versus JNSQ versus GPP), it would be nice if a script could safely query (without crashing) whether or not a body exists. Right now I don't see a means to do that.

i.e. if you do BODY("Mun") and there is no such body as Mun, the script crashes, but the script has no way to test with if BODYEXISTS("Mun") first, since no such test exists.