IF (qflag AND 1) = 1 then warning is: MARGINAL DETECTION of at least one source component
IF (qflag AND 2) = 1 then warning is: FIT IS SUSPECT since at least one fitted parameter is at edge of its range.
IF (qflag AND 4) = 1 then warning is: FIT IS UNSTABLE due to shallow chisq minimum.
IF (qflag AND 8) = 1 then warning is: LARGE UNCERTAINTY in at least one fitted parameter.