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Re: [Help-glpk] MILP solutions using different solvers


From: Robbie Morrison
Subject: Re: [Help-glpk] MILP solutions using different solvers
Date: Sun, 3 Mar 2013 07:00:22 +1300
User-agent: SquirrelMail/1.4.22

Hi all

------------------------------------------------------------
To:           Sundaravalli Narayanaswami <address@hidden>
Subject:      Re: [Help-glpk] MILP solutions using different solvers
Message-ID:  <address@hidden>
From:         Andrew Makhorin <address@hidden>
Date:         Sat, 02 Mar 2013 19:04:46 +0400
------------------------------------------------------------

> The objective function in your model has a
> constant term, so called "shift". When the model
> is passed directly to the glpk mip solver, the
> constant term is taken into account, however, it
> is not written to mps file. Probably you missed
> the message displayed by glpsol like this:

[snip]

The GLPK wikibook now contains this information:

  
http://en.wikibooks.org/wiki/GLPK/Troubleshooting#Objective_shift_term_ignored_when_exported

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
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