Hi, Im working with Xpress-BCL.
Is there a way to get the variables or expression branched on in the node callback functions?
Consider for instance binary variables x1, x2, x3. If the callback node is in the x1 <= 0, x2>=1 branch and poses no restrictions on x3, is there a way to get this information about the variables?
Also is there a way to add a cut in a callback node and immediately solve the new LP-relaxation to see the effect of the new cut? Something like the following:
currentObj = prob.getObjective();
newObj = prob.lpOptimize() ;