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<div style="direction: ltr;">Thanks Haroldo for the reply. But here, even pre-processing was turned off ( along with cut and heuristics) . Please refer the commands those were executed which are mentioned in original message. So, was expecting more solutions.
Could you tell if I am doing something wrong here?</div>
<div><br>
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<div style="direction: ltr;">Regards</div>
<div style="direction: ltr;">Aby</div>
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<div id="divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" style="font-size:11pt" color="#000000"><b>From:</b> Haroldo Gambini Santos <haroldo@ufop.edu.br><br>
<b>Sent:</b> Tuesday, March 3, 2020 11:11:02 PM<br>
<b>To:</b> Aby Subin <aby.subin@nutanix.com>; cbc@list.coin-or.org <cbc@list.coin-or.org><br>
<b>Subject:</b> Re: [Cbc] Multi Solutions for an LP solve using CBC solver</font>
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<div class="BodyFragment"><font size="2"><span style="font-size:11pt;">
<div class="PlainText">Hi,<br>
<br>
This options saves multiple solutions IF in the search process they are <br>
found.<br>
<br>
In this case pre-processing already finds the optimal one, so the search <br>
stops.<br>
<br>
Em 3/1/20 1:57 PM, Aby Subin escreveu:<br>
> Hi all,<br>
><br>
> As per the <br>
> <a href="https://urldefense.proofpoint.com/v2/url?u=https-3A__list.coin-2Dor.org_pipermail_cbc_2012-2DFebruary_000766.html&d=DwIDaQ&c=s883GpUCOChKOHiocYtGcg&r=Bak3-3UtIw0QEwx645L7Agnx0N5k3avy8k01f01AiGY&m=d21DVhe16ObDeSF_FYf8vkL9Kd-QLsztSlwrxN_lkEk&s=Sd9g8RxyAgAmqFLNH-DxEQ22t7-XPhtuQLspqJtEqbw&e=">
https://urldefense.proofpoint.com/v2/url?u=https-3A__list.coin-2Dor.org_pipermail_cbc_2012-2DFebruary_000766.html&d=DwIDaQ&c=s883GpUCOChKOHiocYtGcg&r=Bak3-3UtIw0QEwx645L7Agnx0N5k3avy8k01f01AiGY&m=d21DVhe16ObDeSF_FYf8vkL9Kd-QLsztSlwrxN_lkEk&s=Sd9g8RxyAgAmqFLNH-DxEQ22t7-XPhtuQLspqJtEqbw&e=</a>
, we <br>
> are supporting multiple solutions in CBC. But on trying out a <br>
> sample/test lp file, it is not working as expected<br>
> (tried with both disabling and enablign options for preprocessing, <br>
> heur, cutoff). The LP file content is as follows:<br>
> "<br>
><br>
> \Problem name:<br>
><br>
> Minimize<br>
><br>
> obj: 2 x0 + 5 x1 + 3 x2<br>
><br>
> Subject To<br>
><br>
> cons0:x0 + x1 + x2 = 1<br>
><br>
> Bounds<br>
><br>
> 0 <= x0 <= 1<br>
><br>
> 0 <= x1 <= 1<br>
><br>
> 0 <= x2 <= 1<br>
><br>
> End<br>
><br>
><br>
> "<br>
><br>
><br>
> I was testing the same using CBC shell command. The list of commands <br>
> tries out as follows<br>
><br>
><br>
> Coin:import test.lp<br>
><br>
> Coin:maxSaved 3<br>
><br>
> maxSavedSolutions was changed from 0 to 3<br>
><br>
> Coin:cuts off<br>
><br>
> Option for cutsOnOff changed from on to off<br>
><br>
> Coin:heur off<br>
><br>
> Option for heuristicsOnOff changed from on to off<br>
><br>
> Coin:preprocess off<br>
><br>
> Option for preprocess changed from sos to off<br>
><br>
> Coin:solve<br>
><br>
> Presolve 0 (-1) rows, 0 (-3) columns and 0 (-3) elements<br>
><br>
> Empty problem - 0 rows, 0 columns and 0 elements<br>
><br>
> Optimal - objective value 2<br>
><br>
> After Postsolve, objective 2, infeasibilities - dual 0 (0), primal 0 (0)<br>
><br>
> Optimal objective 2 - 0 iterations time 0.002, Presolve 0.00<br>
><br>
> Coin:solu bestSol.txt<br>
><br>
> Coin:nextB 1bestSol.txt<br>
><br>
> All alternative solutions printed<br>
><br>
><br>
><br>
> Could you please let me know on where I am missing the solutions?<br>
><br>
><br>
> Regards<br>
><br>
> Aby<br>
><br>
><br>
> _______________________________________________<br>
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<br>
<br>
-- <br>
=============================================================<br>
Haroldo Gambini Santos<br>
Computing Department<br>
Universidade Federal de Ouro Preto - UFOP<br>
email: haroldo@ufop.edu.br<br>
home/research page: <a href="https://urldefense.proofpoint.com/v2/url?u=http-3A__www.decom.ufop.br_haroldo&d=DwIDaQ&c=s883GpUCOChKOHiocYtGcg&r=Bak3-3UtIw0QEwx645L7Agnx0N5k3avy8k01f01AiGY&m=d21DVhe16ObDeSF_FYf8vkL9Kd-QLsztSlwrxN_lkEk&s=W8s7lsrnqrWfNnFykaiz33xwsKskK5foOFqUpkA28Vg&e=">
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<br>
<br>
<br>
It has long been an axiom of mine that the little things are infinitely<br>
the most important.<br>
-- Sir Arthur Conan Doyle, "A Case of Identity"<br>
<br>
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