Re: [Fwd: Re: Is it possible to feed glpsol with a feasible initial solution to a MIP problem?]
Alejandro Pascual <[email protected]>
| Newsgroups | gmane.comp.gnu.glpk |
|---|---|
| Message-ID | <CANPvAP1C4p+HOeG73=LEDK_0yzZLup9maGEJc0caMxQ-v4=s9w@mail.gmail.com> |
Hello Chris, Thank you very much for your concern. I tried the --nopresol --nointopt options following your suggestion, but I got the following error message (I attach the log file): localiz0.sol:8: error: wrong solution designator; 'bas' expected Unable to read initial basis Best regards, Alejandro On 7 April 2018 at 10:12, Chris Matrakidis <[email protected]> wrote: > Hi Alejandro, > >> >> Anyway, I can't get glpsol to use the feasible solutition fed with >> --ini. > > > I think you need to disable the presolver with options --nopresol --nointopt > to use a given solution. The presolver generates a new problem, for which > the given solution is no longer valid. > > Best Regards, > > Chris Matrakidis _______________________________________________ Help-glpk mailing list [email protected] https://lists.gnu.org/mailman/listinfo/help-glpk
localiz1.log
(text/x-log, 935 B)
GLPSOL: GLPK LP/MIP Solver, v4.65 Parameter(s) specified in the command line: -m localiz1.mod -d localiz.dat -o localiz1.out -y localiz1.dsp -w localiz1.sol --log localiz1.log --ini localiz0.sol --nopresol --nointopt --tmlim 5400 --cuts Reading model section from localiz1.mod... 199 lines were read Reading data section from localiz.dat... 180 lines were read Generating costoInstTot... Generating Def_y_p1... Generating Def_y_p2... Generating Dem... Generating Cap... Generating BalFluj... Generating PriProx... Generating SecProx... Model has been successfully generated Scaling... A: min|aij| = 1.000e+00 max|aij| = 3.000e+04 ratio = 3.000e+04 GM: min|aij| = 8.766e-01 max|aij| = 1.141e+00 ratio = 1.301e+00 EQ: min|aij| = 7.800e-01 max|aij| = 1.000e+00 ratio = 1.282e+00 Reading basic solution from 'localiz0.sol'... localiz0.sol:8: error: wrong solution designator; 'bas' expected Unable to read initial basis