Dear Han, First of all, thank you very much for developing ASTAP. I have been trying to solve an unusual problem for several days without success and I hope you might be able to help. My system: Windows 10 Pro 64-bit Intel Core i7 32 GB RAM ASTAP installation: Installation path: E:\Astro\ASTAP\astap\ D80 star database installed in the same location. The database is recognized by ASTAP. I tested the following ASTAP versions: 2026.07.16 2025.02.17 Both versions behave exactly the same. The problem...