------------------------------------------------------------ To: Edd Barrett <[email protected]> Subject: Re: [Help-glpk] glpsol, arbitrary precision and large numbers Message-ID: <[email protected]> From: Edd Barrett <[email protected]> Date: Fri, 29 Jun 2012 10:42:35 +0100 ------------------------------------------------------------
> On Wed, Jun 27, 2012 at 01:03:35PM +0100, Edd Barrett wrote: > >> Which is false, so under this assignment the system >> in infeasible. The solver should have either tried a >> different assignment of either variables, or if it >> could not, then it should have reported the problem >> infeasible? Right? > > Any thoughts on this? I am keen to figure out what went > wrong here. > > Cheers > > -- > Best Regards > Edd Barrett > > http://www.theunixzoo.co.uk Hi Edd No idea what the underlying problem is but here are some debugging suggestions: * try formulating a minimum reproducible case and circulate that * check the KKT conditions if appropriate http://en.wikibooks.org/wiki/GLPK/Solution_information#Karush-Kuhn-Tucker_optimality_conditions * export your MathProg model in MPS format and try solving that with GLPSOL or with other solvers http://en.wikibooks.org/wiki/GLPK/Interoperability#MPS_free_format HTH, Robbie --- Robbie Morrison PhD student -- policy-oriented energy system simulation Technical University of Berlin (TU-Berlin), Germany University email (redirected) : [email protected] Webmail (preferred) : [email protected] [from Webmail client] _______________________________________________ Help-glpk mailing list [email protected] https://lists.gnu.org/mailman/listinfo/help-glpk
