MG

Thank you David, I have written an algorithm which uses the callback method to insert two types of lazy constraints. I  want to spilt this in two different callbacks. The first callback shoud add n...

Thank u so much Jaromil, I guess that is exactly what I was searching for :).  

Hello Matthias, I have found the problem, tho the matrix is uni modular but actually there is always a way to implement an lp-heuristic. But the problem here are the constraints that as u said push...

Thank u Matthias, the Matrix is in fact totally uni-modular and the is always a opt solution. That is not the point, I am implementing an algorithm for an Operational-Interval-Scheduling-Problem wh...