<html><head></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px;">Hi Issam,</div><div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><div><br></div><div>Thank you for your interest in CMPL. We are really interested to connect BaPCod with CMPL. </div><div><br></div><div>Integrating BaPCoD as a normal MIP solver is not complicated, because we only have to specify a interface format for the generated model instance, the solver arguments, the optimisation results and the solver messages (e.g.OSiL and OSrL). </div><div><br></div><div>Due to the second issue (variables and constraints defining subsystems ...) we need a little bit more input what kind of information BaPCoD needs as arguments for the automatic reformulations. </div><div>Having these information we can decide how we can implement it. This information have also an impact on the data format for the generated problem that CMPL commits to the solver. I haven't seen that e.g. OSiL provides such informations. Therefore it could be possible that we create a new format or that we extend OSiL (or another format) by the decomposition data. </div><div><br></div><div>Thanks,</div><div><br></div><div>Mike</div><div> </div><div><br></div><div><br></div></div><blockquote type="cite"><div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><div><br></div><div><br></div><div><br></div><div><br></div><div><br></div><div><br></div><div>We have to talk about interface files (e.g. OSiL and OSrL or others.) </div><div><br><div><div>Am 19.02.2014 um 10:54 schrieb Issam Tahiri:</div><br class="Apple-interchange-newline"><blockquote type="cite"><div><div style="font-family: times new roman, new york, times, serif; font-size: 12pt; color: #000000"><div>Hi all,<br></div><div><br></div><div>I am a new user of Cmpl and I have to say that this project is really great. Congratulations.<br></div><div><br></div><div>I am looking forward to participating in a further development of this language and system in order to deal with some features of the solver "Bapcod" that my team has been developping (<a href="https://realopt.bordeaux.inria.fr/?page_id=2">https://realopt.bordeaux.inria.fr/?page_id=2</a>)<br></div><div><br></div><div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; ">BaPCod is a prototype code that solves Mixed Integer Programs (MIP) by application of a Dantzig-Wolfe reformulation technique. The reformulated problem is solved using a branch-and-price (column generation) algorithm.</div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; "><br></div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; ">First off, I would like to interface Cmpl with Bapcod; and I guess this should be easy through simple communication with Osil and Osrl files. Then, (and here is the more difficult task) I would like to add in Cmpl the possibility for the user to specify which of the constraints and variables define the subsystems on which the decomposition is based.<br></div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; "><br></div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; ">Do you think it is feasible? I am full-time developer of Bapcod so time wouldn't be a matter. However I would appreciate if you can provide some indications (for instance which part of the Cmpl sources need to be modified for this purpose).<br></div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; "><br></div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; ">Thanks in Advance<br><br></div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; ">Best regards,<br></div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; ">Issam Tahiri.<br></div></div></div></div>_______________________________________________<br>Cmpl mailing list<br><a href="mailto:Cmpl@list.coin-or.org">Cmpl@list.coin-or.org</a><br><a href="http://list.coin-or.org/mailman/listinfo/cmpl">http://list.coin-or.org/mailman/listinfo/cmpl</a></blockquote></div><br></div></div></blockquote></div><br></body></html>