Thanks to FET timetable generator. It has generated my timetable very well.
I generated my Timetable well and posted it to users. My problem is now to make a few changes that were brought by a section of teachers and student sets. How do i make the changes leaving the entire timetable unaffected? This is because when i make any change, i am asked to process first and i know this may affect the entire timetable.
Volker or other users might answer better than me.
You might get the locked timetable (see the fet-results, get the file file_data_and_timetable.fet, or generate starting from the same random seed as you did initially). If your file is not locked, lock it (the file_data_and_timetable.fet is locked), then unlock the activities you want to change, then regenerate.