Re: Is it possible to feed glpsol with a feasible initial solution to a MIP problem?
Andrew Makhorin <[email protected]>
| Newsgroups | gmane.comp.gnu.glpk |
|---|---|
| Message-ID | <1523005981.5119.4.camel@corvax> |
On Thu, 2018-04-05 at 14:40 -0300, Alejandro Pascual wrote: > Hi, > > I am working on a MIP problem for which glpsol can't find a feasible > solution in a reasonable amount of time. However, fixing the values of > the integer variables (which are all binary) to one, I can get glpsol > to find an optimum solution rather quickly. Is it possible to feed > this solution as initial (suboptimal) solution of the original > problem? Yes. Save the mip solution found with 'glpsol ... -w FILENAME' and then specify it as initial one 'glpsol ... --ini FILENAME'. BTW, did you try using --fpump or --proxy to find a feasible solution? > > I have read in the help-list that this was not possible with MathProg > in 2007, but maybe now it is. If it is not, what would be the most > direct way to hack the code in order to do so? > > Regards, > Alejandro Pascual > > _______________________________________________ > Help-glpk mailing list > [email protected] > https://lists.gnu.org/mailman/listinfo/help-glpk >