[Coin-discuss] OsiClp/Clp initialSolve

[Jan-Willem.Goossens at nc3a.nato.int]

Hi again,

Thanks for the quick reply and code change! 


After updating, I saw this in Coin/CoinFileIO.cpp (Rev 1.3) :

char * environ = getenv("HOME");			(line 592)

This causes a problem (at least on my windows machine), because stdlib.h
contains a macro def called   environ  
Just changing the name environ into something else solves this.


Jan-Willem



-----Original Message-----
From: coin-discuss-bounces at list.coin-or.org
[mailto:coin-discuss-bounces at list.coin-or.org] On Behalf Of John J
Forrest
Sent: 07 October 2005 22:46
To: Discussions about open source software for Operations Research
Subject: Re: [Coin-discuss] OsiClp/Clp initialSolve



Your wish is my command. 

If the user has not set any hints (apart from reducing printout) and if
there is an all slack basis OsiClp will do a ClpSimplex::initialSolve
with some of the more exotic possibilities switched off. 


<Jan-Willem.Goossens at nc3a.nato.int> 
Sent by: coin-discuss-bounces at list.coin-or.org 
10/07/2005 09:20 AM Please respond to
Discussions about open source software for Operations Research        

To<coin-discuss at list.coin-or.org> 
cc
Subject[Coin-discuss] OsiClp/Clp initialSolve







Hi all,

I noticed that solving some LPs through OsiClp takes longer than solving
them with Clp (simple initialSolve), without any Hints set. From what I
can see, there is quite some code in the OsiClp initialSolve, e.g. to
see whether or not to use primal/dual simplex etc. 
Wouldn't it be a good idea for OsiClp initialSolve to rely more on Clp's
logic here, at least in no-hints/automatic mode? Or am I seeing this the
wrong way?..

Thanks,

Jan-Willem Goossens

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