GAMS — The Solver Manuals - Available Software

SNOPT 551
Model status
Remarks
1 OPTIMAL Applies only to linear models.
2 LOCALLY OPTIMAL A local optimum in an NLP was
found. It may or may not be a global
optimum.
3 UNBOUNDED For LP’s this message is reliable. A
badly scaled NLP can also cause this
message to appear.
4 INFEASIBLE Applies to LP’s: the model is infeasible.
5 LOCALLY INFEASIBLE Applies to NLP’s: Given the starting
point, no feasible solution could
be found although feasible points
may exist.
6 INTERMEDIATE INFEASIBLE The search was stopped (e.g., because
of an iteration or time limit)
and the current point violates some
constraints or bounds.
7 INTERMEDIATE NONOPTIMAL The search was stopped (e.g., because
of an iteration or time limit)
and the current point is feasible but
violates the optimality conditions.
8 INTEGER SOLUTION Does not apply to SNOPT.
9 INTERMEDIATE NON-INTEGER Does not apply to SNOPT.
10 INTEGER INFEASIBLE Does not apply to SNOPT.
ERROR UKNOWN
Check listing file for error messages.
ERROR NO SOLUTION
Check listing file for error messages.
Table 32.1: Model status values
Solver status
Remarks
1 NORMAL COMPLETION SNOPT completed the optimization
task.
2 ITERATION INTERRUPT Iteration limit was hit. Increase the
iterlim option (see §4.1).
3 RESOURCE INTERRUPT Time limit was hit. Increase the
reslim option (see §4.1).
4 TERMINATED BY SOLVER Check the listing file.
5 EVALUATION ERROR LIMIT domlim error limit was exceeded.
See §4.1.
6 UNKNOWN ERROR Check the listing file for error messages.
ERROR SETUP FAILURE
Id.
ERROR SOLVER FAILURE
Id.
ERROR INTERNAL SOLVER FAILURE Id.
ERROR SYSTEM FAILURE
Id.
Table 32.2: Solver status values