énigma!

[Liviu Lalescu]

even using the Moroccan version, it does not solve the problem.

But you could use the Moroccan version and add each room in a different building (for students)?

I think this new constraint will also be useful for the official version of FET

Hmm, it is quite difficult to add the constraints min gaps between room changes/max room changes per day/week for students/teachers, in the general case. May I add your idea in the TODO list for now?

[Liviu Lalescu]

I added your suggestion in the TODO, for now. I am sorry I cannot do it soon.

[Benahmed Abdelkrim]

     my idea concerns this particular case and I fear that it can not be generalized because of the problem of specialized rooms and activities of 1 hour duration.

    this idea is feasible for a limited number of student sets that do not have fixed rooms, and when teachers have to move from one building to another.

   I reformulate my idea: the following space constraint is very useful for very particular cases like the one mentioned above:
min gaps between room changes for a students sets

[Liviu Lalescu]

     my idea concerns this particular case and I fear that it can not be generalized because of the problem of specialized rooms and activities of 1 hour duration.

    this idea is feasible for a limited number of student sets that do not have fixed rooms, and when teachers have to move from one building to another.

   I reformulate my idea: the following space constraint is very useful for very particular cases like the one mentioned above:
min gaps between room changes for a students sets

OK, I added your above words in the TODO.