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  No place is possible: how do you know which place will cause the fewest changes?

In the display Timetable > Course > Timetable, select the course from the list on the left, then the option Diagnosis in the menu bar on the right.

• the number of course resources already occupied by a course that has no space elsewhere,
• the number of course resources already occupied by a course that has a slot elsewhere (if moved, the selected course can be positioned in the slot),
• the number of resources with unavailability.

To see the concerned resources, click and drag the green frame over the slot to be diagnosed: they are displayed in red on the course form.