At a glance

Too many lessons have been assigned to this group — there are not enough time slots.

What causes this error

The total number of lesson slots configured for this group exceeds the maximum number of available time slots. The available slots are determined by the group's time range (earliest start, latest end), the number of school days, and any unavailable periods marked for the group.

For example, if a group has 6 periods per day across 5 days but 3 periods are marked as unavailable, the effective maximum is 27 slots. Assigning 33 lessons is impossible.

How to fix it

1. Reduce the number of lessons — Go to the Lessons section and remove or reduce the frequency of some lessons for this group.
2. Expand the time range — Go to Classes, edit the affected class, and increase MAX_TIMESLOT or MAX_PERIODS_DAY to allow more daily slots.
3. Review unavailable periods — Go to Classes, edit the affected class, and remove any unnecessary unavailability restrictions.

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