1: CAFOS, WARNING: Flatfield correction not applied. In case you want to make it, please find here the list of master flatfields.
2: CAFOS, WARNING: The astrometric correction has failed and only the basic reduction (bias and flatfielding) has been applied to the scientific image.
3: CAFOS, WARNING: The astrometric correction with AstrOmatic.net tool has failed and the astrometric calibration has been performed with Astrometry.net only. Moderate quality/poor astrometry can be expected.
More information on the astrometric correction for CAFOS images can be found here.
4: CAFOS, WARNING: Wrong IMAGTYP. It should be science instead of flat.