Thanks, Vaughan. I actually figured it out--my native key is a calculation based on a bunch of related fields (Contacts_ID::CompanyName or Contacts_FirstName::CompanyName, etc.). In Find mode, that calculation is empty or invalid, therefore the relationship is invalid, therefore no results are found. I've been doing this a long time, and this the first time I've boxed myself into an invalid relationship with the NATIVE key. [i say quietly to myself, "Duh."]