Library

[anisanjum]

Suppose I have 3 sections 1A,1B,1C.
I want all the 3 sections to have the Library class to be on the same period, means 1A,1B,1C all together will have thier respective Lib. classes on 6th period.
How to set this constraint?
Can u help me with it?
Thanks.

[Volker Dirr]

use activity preffered time constraints.
i don't know your dataset.

if you don't have room problems, just add all in the same activity.

if you have room problems, then use activity constraints: same starting time (day+hour) to that activities.
also add an activity prefeered time to (at least) one of that activities.