Lesson 'Geography' (teacher: Jane Doe, group: 7A): only 2 time slots available but 3 are required.
Last updated: Mar 23, 2026
At a glance
There are not enough free time slots to fit all instances of this lesson.
What causes this error
This lesson needs to be placed multiple times per week, but there are not enough valid, non-conflicting time slots available considering:
- Teacher unavailable periods
- Group time restrictions
- Lesson-specific blocked periods
How to fix it
- Reduce the lesson frequency — Lower the number of weekly occurrences for this lesson in the Lessons section.
- Reduce unavailable periods — Check the teacher's and lesson's unavailable periods and remove restrictions where possible.
- Expand the group's time range — Adjust the MIN/MAX_TIMESLOT rules for the group to allow more available slots.