FET doesn't generate a timetable even if the constrait seems correct

[ECAV]

Good morning,

I have a problem with a generation of timetable: I have a teacher who teaches for only 3 hours in a specific 3 hours of the week.

I insert the constraint but FET doesn't generate a timetable even if the constraint seems correct. When I take a look in the "highest stage timetables" one out of three hours is empty (so, why the program doesn't put the activity in the place I want?)

I attach the file, just in case someone can help me.

Thank you very much

[Liviu Lalescu]

Hello,

It is simple: your first teacher (it is about him) cannot respect min 2 hours daily for all the teachers constraint.

[ECAV]

Thank you so much, i've forgotten it 

So, now I have to delete the general constraint and add lots of constraint for each teacher (except him) or can I let the general constraint valid for all except this teacher?

Thank you very much

[Liviu Lalescu]

You are welcome!

FET does not allow exceptions, each constraint is respected. But in the new versions of FET, you can add a constraint min 2 hours daily for each teacher with a single click ("Add constraints" button in the respective add constraint dialog), and then deactivate or remove for this teacher. I checked for your file and it generates easily this way.

[ECAV]

Thank you very much, FET is fantastic and you are too. I've been using it for years!

[Liviu Lalescu]

You are welcome! Thank you for your kind words! How many years, if I may ask?

If you appreciate the program, please spread the word that it is useful and also that it is a benevolent work, sustained only by kind donations, and it is unfortunately difficult living out of this free software.

[ECAV]

Four years, before knowing it I used another program and I was in a terrible situation for weeks... then I discover FET and it was genial.

Of course, I'll spread the word what you said and I also agree! Bye,

[Liviu Lalescu]

Thank you for your kind words!

Bye!