Hello Han, Thank you for ASTAP. We use astap_cli in an open-source observatory-control project, and our nightly test caught a regression in CLI-2026.10.30, which we then bisected with builds from your repository. We see it on Linux x64, Linux arm64, macOS M1 and Windows x64. Test frame (2 MB, 1024×1024 crop of an FSQ106 + QHY600M frame of M101, pointing keywords removed): m101_known.fits (github.com). Database: D05 (d05_star_database.zip, unchanged since 2026-05). Command: astap_cli -f m101_known.fits...