Mario Ruthmair

Hi Eli, Your callback should be written to generate lazy constraints to cut off MIPSOL solutions that violate your capacity constraints, even if you have previously added the same lazy constraints...

Hi Eli, this is indeed a very interesting point! The problem I want to solve is a capacitated routing problem. Capacity cuts (the cut you are mentioning above is one of them) are used both as lazy ...

Hi Jaromił, if I add all lazy constraints a priori to the model with lazy attribute 1, then all lazy constraints are correctly satisfied and the solution is different (I added the LP file including...

The answer to question 4 is in fact easy: It is the total number of callback calls, including POLLING, PRESOLVE, MIPSOL, MIPNODE, etc., not only the user-cut callbacks. Best regards, Mario