The Nonlinear Programming Solver

Iteration Log for Multistart

When the MULTISTART option is enabled, the iteration log differs from that of the local solver. More specifically, when a value of 2 is specified for the MSLOGLEVEL= option, 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.