At a glance

The combination of constraints makes this division impossible to schedule.

What causes this error

The overall configuration for this division — combining room availability, teacher availability, subgroup constraints, and timing rules — results in a situation where no valid schedule can be found.

How to fix it

Review all constraints related to this division:

1. Room availability — Are there enough rooms available at the right times?
2. Teacher availability — Are all teachers available when needed?
3. Subgroup lesson counts — Are all subgroups balanced in lesson count and duration?
4. Time restrictions — Are the time range rules too restrictive for the number of lessons?

Relax one or more of these constraints to make the division schedulable.

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