Taihao Zhang

Hi Jaromił, thank you for your explanation. I tried adding all indicator variables in the beginning, which however messed up my initial heuristic for MIPStart, and as you said, them being exponenti...

Hi Jaromił, I stumbled upon this post while searching for general constraints. In my case I actually try to do the latter of the options you gave: I have a general constraint (indicator constrain...

Hi Riley, you are right that a larger instance works as expected. Meanwhile, I have worked out a workaround where I use a strategy pattern to retrieve fractional solutions in MIPNODE and integer so...

Hi Riley, I'm afraid that doesn't change much. This is a fairly small instance, so I guess the model is solved before diverting to cutting planes (?). Of course, this process should (in theory) yie...

Hi Riley,   thanks for your quick response. It appears so that MIPNODE callback is not reached. I put a print statement at the beginning of the callback: (my code is in Kotlin, it's using entirely ...

Hi, I'm working on a similar problem. Thank you for the detailed clarification of MIPSOL/MIPNODE in your first response. In my case, I wish to do subtour elimination on fractional solutions (via a ...