GAMS — The Solver Manuals - Available Software

SNOPT 545
27 2 1.0E+00 138 1.020587E+03 7.0E-03 9.4E-03 3 1.7E+00 FF n
28 1 8.3E-01 140 1.020953E+03 1.8E-03 9.2E-03 3 1.7E+00 FF n
29 2 1.0E+00 141 1.022140E+03 6.9E-05 1.2E-01 2 1.7E+00 FF n
30 2 2.0E-01 146 1.026369E+03 2.1E-03 1.5E-01 3 1.7E+00 FF n
31 1 1.6E-01 151 1.029081E+03 3.1E-03 1.5E-01 3 1.7E+00 FF n
32 1 1.3E-01 157 1.031408E+03 3.6E-03 1.5E-01 3 1.7E+00 FF n
Major Minor Step nCon Merit Feasibl Optimal nS Penalty PD
33 1 1.2E-01 163 1.033557E+03 4.0E-03 1.4E-01 3 1.7E+00 FF n
34 1 1.1E-01 169 1.035594E+03 4.3E-03 1.3E-01 3 1.7E+00 FF n
35 2 1.1E-01 175 1.037544E+03 4.6E-03 1.1E-01 2 1.7E+00 FF n
36 2 1.3E-01 180 1.039584E+03 4.8E-03 3.6E-03 3 1.7E+00 FF n R
37 1 1.0E+00 181 1.046222E+03 7.6E-05 3.5E-03 3 1.7E+00 FF n
38 2 1.0E+00 182 1.046738E+03 7.1E-05 5.6E-02 2 1.7E+00 FF n
39 2 5.1E-01 184 1.049069E+03 1.6E-03 4.6E-02 1 1.7E+00 FF n
40 1 2.7E-01 188 1.050915E+03 2.4E-03 2.6E-02 1 1.7E+00 FF n
41 2 4.3E-01 191 1.053326E+03 2.8E-03 1.5E-02 2 1.7E+00 FF n
42 1 1.0E+00 192 1.057724E+03 2.1E-03 1.3E-03 2 1.7E+00 FF n
43 1 1.0E+00 193 1.058918E+03 1.5E-05 2.9E-04 2 1.7E+00 FF n
Major Minor Step nCon Merit Feasibl Optimal nS Penalty PD
44 1 1.0E+00 194 1.058920E+03 2.7E-06 1.6E-05 2 1.7E+00 FF n
45 1 1.0E+00 195 1.058920E+03 3.7E-09 5.2E-07 2 1.7E+00 TT n
EXIT - Optimal Solution found, objective: 1058.920
--- Restarting execution
--- chenery.gms(227) 0 Mb
--- Reading solution for model chenrad
--- Executing after solve
--- chenery.gms(241) 3 Mb
*** Status: Normal completion
--- Job chenery.gms Stop 10/31/06 16:38:29 elapsed 0:00:00.125
GAMS prints the number of equations, variables and non-zero elements of the model it generated. This gives an
indication of the size of the model. SNOPT then says how much memory it allocated to solve the model, based
on an estimate. If the user had specified a different amount using the work option or the workspace model suffix,
there would be a message like
Work space requested by user -- 0.76 Mb
Work space requested by solver -- 0.02 Mb
The SNOPT log shows the following columns:
Major The current major iteration number.
Minor is the number of iterations required by both the feasibility and optimality phases of the QP subproblem.
Generally, Minor will be 1 in the later iterations, since theoretical analysis predicts that the correct active
set will be identified near the solution (see §2).
Step The step length α taken along the current search direction p. The variables x have just been changed to
x + αp. On reasonably well-behaved problems, the unit step will be taken as the solution is approached.
nObj The number of times the nonlinear objective function has been evaluated. nObj is printed as a guide to
the amount of work required for the linesearch.
nCon The number of times SNOPT evaluated the nonlinear constraint functions.