| name | value | description |
| OK | 0x00000000 | No warnings. |
| SKY | 0x00000001 | sky fiber |
| LITTLE_COVERAGE | 0x00000002 | too little wavelength coverage (WCOVERAGE < 0.18) |
| SMALL_DELTA_CHI2 | 0x00000004 | chi-squared of best fit is too close to that of second best (< 0.01 in reduced chi-sqaured) |
| NEGATIVE_MODEL | 0x00000008 | synthetic spectrum is negative (only set for stars and QSOs) |
| MANY_OUTLIERS | 0x00000010 | fraction of points more than 5 sigma away from best model is too large (> 0.05) |
| Z_FITLIMIT | 0x00000020 | chi-squared minimum at edge of the redshift fitting range (Z_ERR set to -1) |
| NEGATIVE_EMISSION | 0x00000040 | a QSO line exhibits negative emission, triggered only in QSO spectra, if C_IV, C_III, Mg_II, H_beta, or H_alpha has LINEAREA + 3 * LINEAREA_ERR < 0 |
| UNPLUGGED | 0x00000080 | the fiber was unplugged, so no spectrum obtained |
