<jargon> (Sun, from aviation) A user's misconfiguration or misuse of a piece of software, producing apparently bug-like results.
E.g. "Joe Luser reported a bug in sendmail that causes it to generate bogus headers." "That's not a bug, that's pilot error. His "sendmail.cf" is hosed."
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Nearby terms: PILE « PIL/I « PILOT « pilot error » Pilot European Image Processing Archive » PIM » PIN