I need help!

[Liviu Lalescu]

Hello, Thai Chi,

Actually, I meant something else, but nevermind!

For your proposal, can't you use the constraint of type activities same starting day (for FET days) or max 0 days between activities (for real days)? I saw these are the conditions to make a timetable like yours above.

[Thai Chi Phuong]

Hello Liviu!
You are right, Liviu. But since I don't have the option to have a real day/day in a shared classroom for only a group of students or a teacher, I have to use such constraints. Thanks for understanding my problem.!

[Liviu Lalescu]

Hello, Thai Chi,

I am sorry, but I do not understand.

[Thai Chi Phuong]

I apologize Liviu, because I did not express the problem more clearly for you to understand; I have a common classroom for many groups of classes and many teachers participating in teaching; I want in a day/practice day that classroom only accepts one group of classes or one teacher. Thank you very much!

[Liviu Lalescu]

Oh, absolutely no problem, Thai Chi, thank you for clarifying this! I don't know if it is possible to make such a constraint and I don't know if I have the strength to add it.

You say "one group of classes OR one teacher". Should it be "one group of classes AND one teacher"? So each day/real day of a room should contain only one students year AND only one teacher?

[Thai Chi Phuong]

Hello Liviu!
Thank you for understanding me! You are so smart. I believe you will help me and the community using this great software!

[Liviu Lalescu]

Thank you for your kind words!

[Thai Chi Phuong]

Hello Liviu!
Hope I can express so that You understand what we want, Please help us have a command button to do it quickly: In a day/day the music classroom only accepts one teacher (Hong or Hue); The physics classroom only accepts one group of students (6A,6B,6C,6D or 7A,7B,7C,7D or 8A,8B,8C,8D or 9A,9B,9C,9D).
Thank you very much!
https://drive.google.com/file/d/17FIRWwPRN1Yp4aBAKY1N3JNMCIbIL4Wd/view?usp=sharing

[Liviu Lalescu]

Hello, Thai Chi,

I have a proposal: you will add an activity tag to the activities, and a possible constraint would be: room max 1 activity tag per day/real day from set. Is that good?

I will think of this; but I cannot promise I will do it.

[Thai Chi Phuong]

Hello Liviu!
That's right Liviu. The room has a maximum of one, or a maximum of two cards from a set of cards active during the day/real day. Thank you very much!

[Liviu Lalescu]

For two is much more complicated. Isn't it enough with one?

[Thai Chi Phuong]

Hello Liviu!
One card in a set of active cards is enough in most cases, but adding the option of up to two cards would be great. Thank you very much!

[Liviu Lalescu]

Thank you for the clarification, Thai Chi!

I won't promise I will do it.

[Liviu Lalescu]

Please tell me, Thai Chi, are you using virtual rooms in any of your files? If this constraint could be made, it cannot be used in a file with virtual rooms.

[Thai Chi Phuong]

Hello Liviu!
I am very happy to receive your message.
In some cases I use virtual rooms. But I will consider to have the appropriate choice for each of my files.
Thank you very much!