The Nonlinear Programming Solver
When the MULTISTART=() option is specified, the iteration log differs from that of the local solver. More specifically, when a value of 2 is specified for the LOGLEVEL= suboption, the following information is displayed in the log:
- Start
-
indicates the index number of each local optimization run. The following indicators can appear beside this number to provide additional information about the run:
- *
-
indicates the local optimization started from a user-supplied point.
- r
-
indicates the local optimization converged to a previously found optimal solution.
- R
-
indicates the local optimization started from a user-supplied point and converged to a previously found optimal solution.
- Best Objective
-
indicates the value of the objective function at the best local solution found so far.
- Local Objective
-
indicates the value of the objective function obtained at the solution returned by the local solver.
- Infeasibility
-
indicates the infeasibility error at the solution returned by the local solver.
- Optimality Error
-
indicates the optimality error at the solution returned by the local solver.
- Local Iters
-
indicates the number of iterations taken by the local solver.
- Local Status
-
indicates the solution status of the local solver. Several different values can appear in this column:
- OPTIMAL
-
indicates that the local solver found a locally optimal solution.
- BESTFEASIBLE
-
indicates that the local solver returned the best feasible point found. See the SOLTYPE= option for more information.
- INFEASIBLE
-
indicates that the local solver converged to a point that might be infeasible.
- LOCALINFEAS
-
indicates that the local solver converged to a point of minimal local infeasibility.
- UNBOUNDED
-
indicates that the local solver determined that the problem is unbounded.
- ITERLIMIT
-
indicates that the local solver reached the maximum number of iterations and could not find a locally optimal solution.
- TIMELIMIT
-
indicates that the local solver reached the maximum allowable time and could not find a locally optimal solution.
- ABORTED
-
indicates that the local solver terminated due to a user interrupt.
- FUNEVALERR
-
indicates that the local solver encountered a function evaluation error.
- NUMERICERR
-
indicates that the local solver encountered a numerical error other than a function evaluation error.
- INTERNALERR
-
indicates that the local solver encountered a solver system error.
- OUTMEMORY
-
indicates that the local solver ran out of memory.
- FAILED
-
indicates a general failure of the local solver in the absence of any other error.