George Moromisato: “If you specify +attrib on systemCriteria you are saying that a system MUST have that attribute for your station to appear. If you specify two attributes, then the system must have BOTH attributes for your station to appear.”

AssumedPseudonym: “Okay, that helps explain a few things, though it does leave me puzzled as to how I wound up with that Ansabi Metropolis (-domainSpace; outerRealm; ansabiSpace) in System AE 3 (humanSpace; theBackroads; yatfwanAccord) in a test run.”

George Moromisato: “Criteria require plus signs: +outerRealm; +ansabiSpace”
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 You have some tidying up to do in TSB_Encounters_Factional.xml in other words. Also, you may want to add a general theStarsBeyond attribute to all of your systems.
 Also also, it might be worth adding some systemCriteria to the Procyon stations. It feels kinda weird running into their foundries just outside Eridani (or, worse, just outside of Zyr).