fluthecrank AAplus was unable to check objects centering by plate solving.
If "AAplus" refers to an ASIAIR, it is not capable of plate solving within 30º of the two poles because the ASIAIR did not include the asterism database from astrometry.net for those regions.
If you are lucky, the field of view (FOV) of your telescope includes some stars outside of the 30º declination circles, and will sometimes plate solve, but not guaranteed.
This is one of the (many) known defects of the ASIAIR.
The ASIAIR Polar Alignment (if that is what PA refers to) uses its own database, instead of the the general one that is used for plate solving.
Chen
