This common Mitosis error can't find the master patient you've listed. Which error message corresponds to this situation?

• A. Unknown Master Patient
• B. Invalid Master Patient
• C. Missing Master Record
• D. Master Patient Not Found

Answer: (B)

The key idea is distinguishing between a reference that exists but can’t be used versus something that simply isn’t there. When you’re told you can’t find the master patient you listed, it usually means the referenced master patient is present in the request but is invalid for processing—maybe the identifier is malformed or the record doesn’t pass validation. That’s why the error message should indicate an invalid master patient. Other messages would apply to different situations: if there were no matching record at all, you’d see something about not finding or unknown; if the data for the master record were missing entirely, that would be a missing record message. So the phrase that best fits the scenario—where the reference is recognized but not usable due to invalidity—is the one describing an invalid master patient.