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Re: [Help-glpk] [Fwd: glp_intopt conversion of solutions via callback]

From: Michael Hennebry
Subject: Re: [Help-glpk] [Fwd: glp_intopt conversion of solutions via callback]
Date: Fri, 15 Jan 2016 20:36:25 -0600 (CST)
User-agent: Alpine 1.00 (DEB 882 2007-12-20)

On Fri, 15 Jan 2016, Heinrich Schuchardt wrote:

Looking at the code in src/glpkapi09.c and glpapi13.c the documentation
is wrong.

The problem accessible in the MIP callback is the presolved and scaled
problem. So if you have a heuristic solution expressed in your original
variables you should switch off presolving and scaling.

Perhaps it would be a good idea to make the presolving and
scaling transformation available to the user program.
It could just be a matter of documentation.
The information must already be somewhere,
otherwise glpsol could not invert it.

Michael   address@hidden
"Sorry but your password must contain an uppercase letter, a number,
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