Hello again,
A solved a scheduling problem with glpk
that had binary variables like x[I,j,k]
= 1 if the course i takes place in the timeslot j and
room k . It has 100000 variables. After pre_solve it
has 25000 variables. In a few minutes it finds a solution saying optimal
solution found, but then it goes to the second part ,
when it tries to find mip solution. There it doesn’t
find any solution(or at least it didn’t in the
last 30 minutes,it is still running). Can I somehow speed
up the process? Can I find any partial solution? If I tell it to run for x
seconds, then it will put all variables to zero.
Thank you,
Dan