GAMS — The Solver Manuals - Available Software

550 SNOPT
EXIT -- Function evaluation error limit
The domain error limit was reached. Increase the GAMS domlim option, or better add better bounds (or
linear equations) such that functions and derivatives can be evaluated.
EXIT -- Terminated during objective evaluation
EXIT -- Terminated during constraint evaluation
EXIT -- Terminated from monitor routine
These messages indicate troubles evaluating the non-linear functions or derivatives. Usually these errors
show a “Function evaluation error limit” message.
6 Listing file messages
The listing file (.lst file) also contains feedback on how the SNOPT solver performed on a particular model. For
the chenery.gms model, the solve summary looks like the following:
S O L V E
S U M M A R Y
MODEL chenrad OBJECTIVE td
TYPE NLP DIRECTION MAXIMIZE
SOLVER SNOPT FROM LINE 227
**** SOLVER STATUS 1 NORMAL COMPLETION
**** MODEL STATUS 2 LOCALLY OPTIMAL
**** OBJECTIVE VALUE 1058.9199
RESOURCE USAGE, LIMIT 0.063 1000.000
ITERATION COUNT, LIMIT 179 10000
EVALUATION ERRORS 0 0
SNOPT-Link BETA 1Nov06 WIN.SN.SN 22.3 043.058.041.VIS SNOPT 7.2-4
GAMS/SNOPT, Large Scale Nonlinear SQP Solver
S N O P T 7.2-4 (June 2006)
P. E. Gill, UC San Diego
W. Murray and M. A. Saunders, Stanford University
Work space allocated -- 0.29 Mb
EXIT - Optimal Solution found, objective: 1058.920
Major, Minor Iterations 45 179
Funobj, Funcon calls 196 196
Superbasics 2
Aggregations 0
Interpreter Usage 0.00 0.0%
Work space used by solver -- 0.11 Mb
The solver completed normally at a local (or possibly global) optimum. A complete list of possible solver status
and model status values is in Tables 32.1 and 32.2.
The resource usage (time used), iteration count and evaluation errors during nonlinear function and gradient
evaluation are all within their limits. These limits can be increased by the option reslim, iterlim and domlim
(see §4.1).