<div dir="ltr"><div><div>Hi Romain,<br><br>What's the version of DipPy you are using? How are you reading the problem into DipPy? Are you able to share the Python script you're using?<br><br></div>Cheers,<br><br></div>Ted<br><div><div><br><br></div></div></div><div class="gmail_extra"><br><div class="gmail_quote">On Thu, Feb 16, 2017 at 2:04 PM, Romain Montagné <span dir="ltr"><<a href="mailto:romain.montagne@polymtl.ca" target="_blank">romain.montagne@polymtl.ca</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div style="word-wrap:break-word">Hello Ted,<div><br></div><div>I am using DIP as a generic solver. I have simply created a dippy.DipProblem that I solve with and without the doPriceCut option, like in the examples that are provided. </div><div><br></div><div>I have attached 4 files:</div><div><br></div><div>- LP.lp is the .lp file</div><div>- LP_blocks.txt is the block file </div><div>- DoPriceCut0_terminal_output.<wbr>txt is what I see on my screen when I solve the problem without the doPriceCut option (and it works fine)</div><div>- DoPriceCut1_terminal_output.<wbr>txt is what I see on my screen when I solve it with the doPriceCut option (and it tells me problem infeasible)</div><div><br></div><div>The version of DIP that I am using is 1.4.8. I work on a linux 64 bit machine, and my compiler is gcc, version 4.4.7.</div><div><br></div><div>If you need other information please let me know.</div><div><br></div><div>Thank you very much for your help,</div><div><br></div><div>Romain</div><div><br></div><div><br></div><div><br></div><div></div></div><br><div style="word-wrap:break-word"><div></div></div><br><div style="word-wrap:break-word"><div></div></div><br><div style="word-wrap:break-word"><div></div></div><br><div style="word-wrap:break-word"><div><br><div><blockquote type="cite"><div>Le 16 févr. 2017 à 11:38, Ted Ralphs <<a href="mailto:ted@lehigh.edu" target="_blank">ted@lehigh.edu</a>> a écrit :</div><br class="m_9014207209334939799Apple-interchange-newline"><div><div dir="ltr"><div><div>Hi Romain,<br><br>Are you using DIP as a generic solver or have you built an application? Can you send the .lp file and the block file, as well as other information, such as version number, platform, compiler, etc.? I would like to try and replicate this.<br><br></div>Cheers,<br><br></div>Ted<br></div><div class="gmail_extra"><br><div class="gmail_quote">On Thu, Feb 9, 2017 at 6:36 PM, Romain Montagné <span dir="ltr"><<a href="mailto:romain.montagne@polymtl.ca" target="_blank">romain.montagne@polymtl.ca</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div style="word-wrap:break-word">PS: After saying the problem is infeasible, I get the following error: <span style="font-family:'Source Sans Pro',sans-serif;font-size:14px;background-color:rgba(123,123,123,0.0980392)">"Segmentation fault (core dumped)"</span><div><div class="m_9014207209334939799h5"><div><br></div><div><br><div><blockquote type="cite"><div>Le 9 févr. 2017 à 17:45, Romain Montagné <<a href="mailto:romain.montagne@polymtl.ca" target="_blank">romain.montagne@polymtl.ca</a>> a écrit :</div><br class="m_9014207209334939799m_-7755450750370568469Apple-interchange-newline"><div><div style="word-wrap:break-word">Hello DIP community,<div><br></div><div>I am using Dippy to solve a MILP. I want to compare branch-and-bound and branch-and-price performances. </div><div><br></div><div>When I solve the problem with branch-and-bound (i.e., with the option <font><font face="Menlo"><font color="#272ad8"><span style="font-size:11px">‘doPriceCut’ </span></font></font><font>set to 0), it works great. But when I activate the </font></font><span style="color:rgb(39,42,216);font-family:Menlo;font-size:11px">‘doPriceCut’ </span>option for branch-and-price, it tells me the problem is infeasible. </div><div><br></div><div>Does anyone know what is happening? </div><div><br></div><div>I have looked at the .lp file as well as the block file and they look ok.</div><div><br></div><div>Any help is greatly appreciated.</div><div><br></div><div>Cheers,</div><div><br></div><div>Romain Montagné, PhD </div></div></div></blockquote></div><br></div></div></div></div><br>______________________________<wbr>_________________<br>
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</div></blockquote></div><br></div></div><br></blockquote></div><br><br clear="all"><br>-- <br><div class="gmail_signature" data-smartmail="gmail_signature"><div dir="ltr"><div><div dir="ltr">Dr. Ted Ralphs<br>Visiting Researcher, Zuse Institute Berlin<br>Professor, Lehigh University<br>(610) 628-1280<br>ted 'at' lehigh 'dot' edu<br><a href="http://coral.ie.lehigh.edu/~ted" target="_blank">coral.ie.lehigh.edu/~ted</a><br></div></div></div></div>
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