Error message "Not Found - GSC..."

[JackG]

When I open the star atlas the message:

"Not found - GSC c:\program files (x86)\astroart\catalog"

appears.

That directory does exist and contains two files:
readme-hipparcos.txt
hipparcos.dat

However, a star atlas does appear, though not with a ton of stars.

Am I doing something wrong?

[Dunmunro]

Which version of Astroart?

[AstroBernd]

The directory for the star catalogs are not in the program folder, but in the <username> documents folder, depending on your installation choices. In AA8, you can even use a compressed GAIA DR2 catalog. Check also your settings in the tab “star atlas”.
Hope this helps.