The Nonlinear Programming Solver
- Overview
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Getting Started
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Syntax
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Details
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ExamplesSolving Highly Nonlinear Optimization ProblemsSolving Unconstrained and Bound-Constrained Optimization ProblemsSolving NLP Problems with Range ConstraintsSolving Large-Scale NLP ProblemsSolving NLP Problems That Have Several Local MinimaMaximum Likelihood Weibull EstimationFinding an Irreducible Infeasible Set
- References
Iteration Log for Multistart
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
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indicates the index number of each local optimization run. The following indicator can appear beside this number to provide additional information about the run:
- *
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indicates the local optimization started from a user-supplied point.
- Best Objective
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indicates the value of the objective function at the best local solution found so far.
- Local Objective
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indicates the value of the objective function obtained at the solution returned by the local solver.
- Infeasibility
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indicates the infeasibility error at the solution returned by the local solver.
- Optimality Error
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indicates the optimality error at the solution returned by the local solver.
- Local Iters
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indicates the number of iterations taken by the local solver.
- Local Status
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indicates the solution status of the local solver. Several different values can appear in this column:
- OPTIMAL
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indicates that the local solver found a locally optimal solution.
- BESTFEASIBLE
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indicates that the local solver returned the best feasible point found. See the SOLTYPE= option for more information.
- INFEASIBLE
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indicates that the local solver converged to a point that might be infeasible.
- LOCALINFEAS
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indicates that the local solver converged to a point of minimal local infeasibility.
- UNBOUNDED
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indicates that the local solver determined that the problem is unbounded.
- ITERLIMIT
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indicates that the local solver reached the maximum number of iterations and could not find a locally optimal solution.
- TIMELIMIT
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indicates that the local solver reached the maximum allowable time and could not find a locally optimal solution.
- ABORTED
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indicates that the local solver terminated due to a user interrupt.
- FUNEVALERR
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indicates that the local solver encountered a function evaluation error.
- NUMERICERR
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indicates that the local solver encountered a numerical error other than a function evaluation error.
- INTERNALERR
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indicates that the local solver encountered a solver system error.
- OUTMEMORY
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indicates that the local solver ran out of memory.
- FAILED
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indicates a general failure of the local solver in the absence of any other error.