Why there are missing classrooms printed in Classes timetables?

If you don't see some classrooms on the cards in your printed reports, it can have these main causes:

1. You have not used classrooms in your timetable at all. Please, see this topic: Classrooms how to create and assign classrooms to the lessons and generate your timetable again.

2. You have assigned classrooms to the lessons AFTER the timetable was created (by generator, or manually). Please, see this: My lessons are not placed in classrooms/Adding classrooms into created timetable

3. You have selected, that if the lesson is placed in "home-classrooms" it should not be printed. Uncheck selected option, to display also these specific classrooms.
See: How can I specify default classroom for certain class