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| From: | Robbie Morrison |
| Subject: | Re: [Help-glpk] MIP Solvers (i.e CBC, CPLEX, GLPK, GUROBI, LPSOLVE, SCIPC, SCIPL, SCIPS and XPRESS) Benchmark |
| Date: | Sun, 25 Nov 2012 09:43:28 +1300 |
| User-agent: | SquirrelMail/1.4.22 |
Hi Andrew, Noli, all ------------------------------------------------------------ To: Noli Sicad <address@hidden> Subject: Re: [Help-glpk] MIP Solvers (i.e CBC, CPLEX, GLPK, GUROBI, Message-ID: <address@hidden> From: Andrew Makhorin <address@hidden> Date: Sat, 24 Nov 2012 09:42:10 +0400 ------------------------------------------------------------ Andrew Makhorin wrote: >> >> That looks confusing? The "maximize" in the model >> >> statement should be picked up, surely?? In which case >> >> the "--max" should be unnecessary (except to override >> >> a "minimize" in the code, from the command line). >> > >> > The mps format does not allow specifying the objective sense. >> > >> >> >> >> Or am I missing something? >> >> Here's the thread about this Fixed MPS that does not allow specifying >> an objective sense. >> >> http://www.mail-archive.com/address@hidden/msg02253.html >> >> Free MPS do can (see the lower portion of the link (below) - i.e. Free >> MPS)). >> >> http://lpsolve.sourceforge.net/5.1/mps-format.htm > > OBJSENSE is a non-standard extension. See > http://www.cenapad.unicamp.br/parque/manuais/OSL/oslweb/features/featur11.htm Please see: http://en.wikibooks.org/wiki/GLPK/Troubleshooting#MPS_formats_and_OBJSENSE I think that the new material is correct, let me know if it is not. TIA. Robbie --- Robbie Morrison PhD student -- policy-oriented energy system simulation Technical University of Berlin (TU-Berlin), Germany University email (redirected) : address@hidden Webmail (preferred) : address@hidden [from Webmail client]
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