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<p>Hi,</p>
<p> I'm trying to solve one instance of a problem that is taking a
long time to obtain a good solution. Since all variables are
binary, probing and implication cuts are doing some work and RINS
and Vnd are apparently also improving solutions. For other
instances of the problem we are solving, CBC has an acceptable
performance but for this instance apparently there's something
going wrong (~20 seconds to get the optimum solution with a
commercial solver versus never getting the optimum solution with
CBC).</p>
<p> If someone can take a look at the model and give me a hint of
what is going on, I would appreciate it.</p>
<p> The model is at
<a class="moz-txt-link-freetext" href="https://drive.google.com/open?id=1bd4jWONmoyAKIi0oLa-AU-ZTu7_8qhb6">https://drive.google.com/open?id=1bd4jWONmoyAKIi0oLa-AU-ZTu7_8qhb6</a><br>
</p>
<div class="moz-signature">-- <br>
<title>SISCOG - Sistemas Cognitivos, SA</title>
<div style="font-family:arial"><br>
<span style="font-size:10pt;color:#F37D00"><b><!-- COLOCAR AQUI O NOME -->
Rui Patrocínio</b></span><span
style="font-size:7pt;color:#808080"><br>
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