How to use constraint

[DucBeNho]

Hi
I don't know what constraint "A teacher begins morning early" means. Because this timetable can't resolve. I deactivate constraint "A teacher begins morning early" then it can resolve.

Please help me check this timetable and tell me which constraint is conflicting with.
Thanks a lot!

[Liviu Lalescu]

Hello, DucBeNho,

The activity for teacher 303 on the first day morning is scheduled at the 3rd hour. This is not allowed by this constraint. The constraint permits begin morning at first hour, or second hour max second beginnings.