At a glance

The minimum value of a rule is set higher than its corresponding maximum.

What causes this error

This error occurs when the minimum value exceeds the maximum value for the same rule, which is a logical contradiction the scheduler cannot resolve.

This can happen in several places:

• Class lesson rules: Min. lessons per day is higher than Max. lessons per day.
• Class timeslot rules: Starting timeslot (Min.) is higher than Ending timeslot (Max.), or Max. starting timeslot is set outside the allowed timeslot range.
• Lesson spread rules: A lesson's Min. days/week is higher than its Max. days/week.

For example: minimum 5 lessons per day but maximum 3 per day is impossible.

How to fix it

1. Class lesson rules — Go to Classes, edit the affected class, and make sure Max. number of lessons per day is greater than or equal to Min. number of lessons per day.
2. Class timeslot rules — Verify that Starting timeslot is less than or equal to Ending timeslot, and that Max. starting timeslot is within the allowed timeslot window.
3. Lesson spread rules — Go to the Lessons section, edit the affected lesson, and make sure Max. days/week is greater than or equal to Min. days/week.

Back