Frequency or Calendar based?
If Frequency and your schedule is set for every 1 day, then it means every 24 hours.
The schedule will only be considered if 24 hours since the last successful backup was done.
Please see this blog:
https://vox.veritas.com/t5/Articles/NetBackup-Frequency-Based-Scheduling/ta-p/810193
If Calendar, please let us know how the shedules are configured.
A daily backup with a window that spans midnight may have gone active after midnight.
This means that a backup for that particular day has already ran.
