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| The OPTLP Procedure |
| PROC OPTLP Macro Variable |
The OPTLP procedure defines a macro variable named _OROPTLP_. This variable contains a character string that indicates the status of the OPTLP procedure upon termination. The various terms of the variable are interpreted as follows.
- STATUS
indicates the solver status at termination. It can take one of the following values:
- OK
procedure terminated normally
- SYNTAX_ERROR
incorrect use of syntax
- DATA_ERROR
inconsistent input data
- OUT_OF_MEMORY
insufficient memory allocated to the procedure
- IO_ERROR
problem in reading or writing of data
- ERROR
status that cannot be classified into any of the preceding categories
- SOLUTION_STATUS
indicates the solution status at termination. It can take one of the following values:
- OPTIMAL
solution is optimal
- CONDITIONAL_OPTIMAL
solution is optimal, but some infeasibilities (primal, dual or bound) exceed tolerances due to scaling or preprocessing
- INFEASIBLE
problem is infeasible
- UNBOUNDED
problem is unbounded
- INFEASIBLE_OR_UNBOUNDED
problem is infeasible or unbounded
- ITERATION_LIMIT_REACHED
maximum allowable iterations reached
- TIME_LIMIT_REACHED
maximum time limit reached
- FAILED
solver failed to converge, possibly due to numerical issues
- OBJECTIVE
indicates the objective value obtained by the solver at termination.
- PRIMAL_INFEASIBILITY
indicates the maximum (absolute) violation of the primal constraints by the primal solution.
- DUAL_INFEASIBILITY
indicates the maximum (absolute) violation of the dual constraints by the dual solution.
- BOUND_INFEASIBILITY
indicates the maximum (absolute) violation of the lower and/or upper bounds by the primal solution.
- DUALITY_GAP
indicates the (relative) duality gap. This term appears only if the interior point solver is used.
- COMPLEMENTARITY
indicates the (absolute) complementarity. This term appears only if the interior point solver is used.
- ITERATIONS
indicates the number of iterations taken to solve the problem.
- PRESOLVE_TIME
indicates the time for preprocessing (seconds).
- SOLUTION_TIME
indicates the time taken to solve the problem (seconds).
Note:The time reported in PRESOLVE_TIME and SOLUTION_TIME is either CPU time (default) or real time. The type is determined by the TIMETYPE= option.
When SOLUTION_STATUS has a value of OPTIMAL, CONDITIONAL_OPTIMAL, ITERATION_LIMIT_REACHED, or TIME_LIMIT_REACHED, all terms of the _OROPTLP_ macro variable are present; for other values of SOLUTION_STATUS, some terms do not appear.
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