setting preferred rooms

[liquid]

The gym subject can be placed in gym room for older classes and "multi-purpose" or gym room for younger ones. I have set such constraints:

• gym subject has preferred room: gym room
• gym activities for younger classes have a set of preferred rooms: mp or gym

What FET does is scheduling all gym activities for younger classes in gym room resulting in lack of gym room for older ones and impossible timetable. No gym activity for younger classes was scheduled in "mp" room.
How to proceed with this problem?

[Volker Dirr]

fet respect all constraints.
so you must to like this:

room constraint subject: gym and mp (for older and younger)

room constraint for activities of older students: gym only.

[liquid]

This helped, Volker. Thanks.