At a glance

A lesson is set to use a pinned room but no room is assigned.

What causes this error

A lesson has the "pin room" flag set, but the room field is empty. The lesson is marked as pinned to a room but there is nothing to pin it to.

The most common scenario is regenerating/evaluating a timetable after rooms were modified. If a room was deleted or renamed after the previous generation, the pin may have been left behind without a valid room reference.

How to fix it

Open the timetable editor, find the lesson, and either:

• Assign a valid room to complete the pin, or
• Unpin it so the scheduler can assign a room automatically.

Back