- Function GMP::SolverSession::GetNodeNumber(solverSession)
GMP::SolverSession::GetNodeNumber returns the number of
the current node during MIP optimization from within a node callback.
GMP::SolverSession::GetNodeNumber( solverSession ! (input) a solver session )
An element in the set
The number of the node for which the callback is called. It returns -1 if this function is not called inside a solver callback, or if it is not supported by the solver.
This function has only meaning for solver sessions belonging to a GMP with type MIP, MIQP or MIQCP.
This function can only be used inside a branch, candidate, cut or heuristic callback.
This function is only supported by CPLEX.
The root node in a branch-and-bound tree gets number 0.