schedule alternate days but same time

[cnumathict]

Very helpful program... Thank you.
Need help in scheduling an activity(class). This is for a university with classes from Monday to Thursday with 1.5hr for each period starting 7:30am to 7:30pm where a class is scheduled to meet twice a week MW or TTh. Tried running FET with activities. It was able to schedule MW or TTh but in different times that is like Class1 is scheduled mon,9am-10:30am and wed 3pm-4:30pm. but what is needed is for Class 1 to be scheduled on the same time as he other day.

By any chance, can we find a way around for this in FET?
Thank you very much.

[Liviu Lalescu]

Maybe you could use constraint activities same starting hour? (not time, only hour).