What does it mean when the parameter XPRS_MIPINFEAS takes the value -1?

Hi Daniel,

Thank you for your repply. I am cheching feasibility of the solutions because I am adding cuts that are, in fact, constraints. Something like when you add subtour elimination costraints in a branch-and-cut fashion for the TSP. I want to make sure that even if a solution is integer is is rejected if it does not satisfy the "feasibility cut".

In the meantime I am facing another problen, which confuses me very much. Now when I add the violated cuts (either with addcut or with addcuts), not only the execution stops abruptly, but I get a message saying "an unexpected exception ocurred in Mosel/Optimizer. It is UNSAFE to continue. Please save your work and restart". I cannot figure out what is the reason for this. It is true I have changed (slightly) the cuts I am generating, but they are quite similar to the previous ones, which did not give me any problem.

Is it a problem if cuts are added from pPREINTSOL?

Thank you again,

Elena