Generation stuck

[D.alexander]

Hello
I would appreciate any insight you may have on my input file.

I have run lots of seeds and multiples, some have run for hours with no luck.
It seems to regularly get stuck on 226 placed activties or 456 (which is also the highest it has acheived).
I have reviewed the highest timetables and there seems to be capacity remaining and the trickiest year groups (12 & 13) appear to resolve.

Kind regards

[Volker Dirr]

I sadly don't have much time at the moment.
So i checked it very quickly only and didn't found a bug yet.

The 265 stuck is not critical. That is normal. Don't worry about that.
The 456 stuck might be critical. I didn't waited long enough yet.
Just as a question. If FET has reached 465 placed activities, does FET stay around 456 placed activities (so maybe go back to 430 "only")? That is normal and might still be solveable.
Or does FET go back pretty strong. Maybe go back to 300 placed activities. In that case it is normaly a bug in the data set.

[Volker Dirr]

There is no bug at 456.
I reduce your 95% constraints down to 0%; just too speed up and locate a bug faster. But it solved in less then 3 minutes. So it should also solve with 95%. Of course i don't know how long it will take. It might take much time, but it should be solveable.
Maybe there are a few min n day constraints with 95% impossible. You should rethink if they are all possible. Maybe locate them by increasing them up to 100% and then check out where it stucks. So you will know the problem and can reduce the problamatic constraint only down to 0%.