Ok!
Perfect solution!
Now I have to search the activities to overlap.
Can I say with FET that a subject A of a group A must be at the same time that a subject B of the group B?
Thanks for your help Liviu
Perfect solution!
Now I have to search the activities to overlap.
Can I say with FET that a subject A of a group A must be at the same time that a subject B of the group B?
Thanks for your help Liviu