Hi, I have a schedued script that runs on daily event and repeat every 15min (no end date) but its always stops from working on 12:00PM. any idea what am i doing wrong?

You probably have a start time set that is not 00:00

ye thats true .. so that may fix the isse?

Yes “it is a daily event that starts at the time X and then runs every 15 minutes until midnight” Set the start time to the earliest possible.