A diagnostic outcome where Loupely ran the capture and correlation but found no clear signal to explain the failure. A null result means the captured data did not contain a pattern Loupely could classify with sufficient confidence. This can happen when the failure is intermittent, when the capture was taken after the failure resolved, or when the cause is outside the scope of what Loupely captures. The capture file is still useful for developer handoff even when the diagnosis returns a null result.