<html><head><meta http-equiv="content-type" content="text/html; charset=utf-8"></head><body dir="auto"><div><span></span></div><div><div>Hi Oscar,</div><div><br></div><div>Unfortunately ... this is not a bug. It is for several reasons not allowed to have variables in brackets. Please see page 33 of the manual. </div><div><span style="font-family: Tahoma; font-size: 10pt; font-weight: 700;">Please note, it is not permissible to put model variables in brackets!</span></div><div class="page" title="Page 33"><div class="layoutArea"><div class="column"><p>I think we will change it in version 2. But this version will be released earliest at the end of next year.</p></div></div></div><div><br>Cheers,</div><div><br></div><div>Mike<br><br></div><div><br>Am 13.12.2014 um 20:33 schrieb Oscar Augusto Téllez Sánchez <<a href="mailto:oskarts@gmail.com">oskarts@gmail.com</a>>:<br><br></div><blockquote type="cite"><div><meta http-equiv="Content-Type" content="text/html charset=utf-8">Hello,<div class=""><br class=""></div><div class="">I´ve got an error when my expression in constrain uses parenthesis like: Cap* (1 - x[i,j] )</div><div class=""><br class=""></div><div class="">i solve it braking them, but may be fixed for next version. Cap - Cap*x[i,j]</div><div class=""><br class=""></div><div class=""><br class=""><div><blockquote type="cite" class=""><div class="">On 10 Dec 2014, at 21:34, Mike Steglich <<a href="mailto:mike.steglich@th-wildau.de" class="">mike.steglich@th-wildau.de</a>> wrote:</div><br class="Apple-interchange-newline"><div class=""><span style="font-family: Helvetica; font-size: 12px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px; float: none; display: inline !important;" class="">OK ... I've seen that is an other model. Could you send it for debugging purposes?</span><div class="" style="font-family: Helvetica; font-size: 12px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px;"><br class=""></div><div class="" style="font-family: Helvetica; font-size: 12px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px;"><br class=""><div class=""><blockquote type="cite" class=""><div class="">Am 10.12.2014 um 20:17 schrieb Indrajit Sen Gupta <<a href="mailto:indrajitsg@gmail.com" class="">indrajitsg@gmail.com</a>>:</div><br class="Apple-interchange-newline"><div class=""><div dir="ltr" class=""><div class="">Hi Mike,</div><div class=""> </div><div class="">Attached is the screenshot. I had kept the task manager open. The RAM usage went up to around 800 Mb at times but then it crashed.</div><div class=""> </div><div class="">Regards,</div><div class="">Indrajit</div><div class=""> </div></div><div class="gmail_extra"><br class=""><div class="gmail_quote">On Wed, Dec 10, 2014 at 4:26 PM, Mike Steglich<span class="Apple-converted-space"> </span><span dir="ltr" class=""><<a href="mailto:mike.steglich@th-wildau.de" target="_blank" class="">mike.steglich@th-wildau.de</a>></span><span class="Apple-converted-space"> </span>wrote:<br class=""><blockquote class="gmail_quote" style="margin: 0px 0px 0px 0.8ex; border-left-width: 1px; border-left-color: rgb(204, 204, 204); border-left-style: solid; padding-left: 1ex;"><div class="" style="word-wrap: break-word;">Could me make a screen copy?<br class=""><div class=""><blockquote type="cite" class=""><div class="">Am 10.12.2014 um 10:43 schrieb Indrajit Sen Gupta <<a href="mailto:indrajitsg@gmail.com" target="_blank" class="">indrajitsg@gmail.com</a>>:</div><div class=""><div class="h5"><br class=""><div class=""><div dir="ltr" class=""><div class="">Mike,</div><div class=""> </div><div class="">Could you please provide the Linux version also? The windows version runs initially, but after running for sometime, it crashes. I am unable to figure out the reason. If you can send me the Linux 64 bit version, I will be able to check if it is a memory problem or not.</div><div class=""> </div><div class="">Regards,</div><div class="">Indrajit</div><div class=""> </div></div><div class="gmail_extra"><br class=""><div class="gmail_quote">On Tue, Dec 9, 2014 at 8:05 PM, Mike Steglich<span class="Apple-converted-space"> </span><span dir="ltr" class=""><<a href="mailto:mike.steglich@th-wildau.de" target="_blank" class="">mike.steglich@th-wildau.de</a>></span><span class="Apple-converted-space"> </span>wrote:<br class=""><blockquote class="gmail_quote" style="margin: 0px 0px 0px 0.8ex; border-left-width: 1px; border-left-color: rgb(204, 204, 204); border-left-style: solid; padding-left: 1ex;"><div class="" style="word-wrap: break-word;">Hi Indrajit,<div class=""><br class=""></div><div class="">Please let me know if you need also a Linux64 version. I could provide it at the end of this week or the beginning of next week.</div><div class=""><br class=""></div><div class="">Thanks,</div><div class=""><br class=""></div><div class="">Mike<br class=""><div class=""><blockquote type="cite" class=""><div class="">Am 09.12.2014 um 13:02 schrieb Indrajit Sen Gupta <<a href="mailto:indrajitsg@gmail.com" target="_blank" class="">indrajitsg@gmail.com</a>>:</div><div class=""><div class=""><br class=""><div class=""><div dir="ltr" class=""><div class="">Thanks a lot Mike. I will try out this beta version and will let you know if I have any questions.</div><div class=""><br class="">Regards,</div><div class="">Indrajit</div></div><div class="gmail_extra"><br class=""><div class="gmail_quote">On Tue, Dec 9, 2014 at 3:59 PM, Mike Steglich<span class="Apple-converted-space"> </span><span dir="ltr" class=""><<a href="mailto:mike.steglich@th-wildau.de" target="_blank" class="">mike.steglich@th-wildau.de</a>></span><span class="Apple-converted-space"> </span>wrote:<br class=""><blockquote class="gmail_quote" style="margin: 0px 0px 0px 0.8ex; padding-left: 1ex; border-left-color: rgb(204, 204, 204); border-left-width: 1px; border-left-style: solid;"><div class="" style="word-wrap: break-word;">Hi Indrajit,<div class=""><br class=""></div><div class="">We found a bug that only occurs for a huge amount of products of variables. This bug will be fixed in Cmpl v.1.10.1 that we will release at the end of the year. </div><div class=""><br class=""></div><div class="">You can use in the meantime a beta version for Windows that you can download under the following link:</div><div class=""><br class=""></div><div class=""><a href="https://www.dropbox.com/s/ofrow6q0hdqf2fq/Cmpl-1-10-1-beta1.zip?dl=0" target="_blank" class="">https://www.dropbox.com/s/ofrow6q0hdqf2fq/Cmpl-1-10-1-beta1.zip?dl=0</a></div><div class=""><br class=""></div><div class="">It seems that this bug fix is resolving the problems with your model. That means the model doesn’t crash. But we are not able to test your model completely because you try to execute 6.7e12 iterations in the objective function!!</div><div class=""><br class=""></div><div class="">I strongly recommend to find a better formulation for your model. the first approach is the following:</div><div class=""><br class=""></div><div class="">Please use:</div><div class=""><br class=""></div><div class=""><span class="" style="white-space: pre-wrap;"> </span>revenue:<span class="Apple-converted-space"> </span><span class="" style="white-space: pre-wrap;"> </span>sum{i in depts, j in locs:c[i,j] * x[i,j] } +<br class=""><span class="" style="white-space: pre-wrap;"> </span>sum{ m in depts, n in loc1, o in depts, p in loc2, u in level: <span class="" style="white-space: pre-wrap;"> </span>x[m, n] * x[o, p] * adj[u, n, p] * rev[u, m, o] } -> max; </div><div class=""><br class=""></div><div class="">instead the original objective function:</div><span class=""><div class=""><br class=""></div><span class="" style="white-space: pre-wrap;"> </span>revenue: sum{i in depts, j in locs, m in depts, o in depts, n in loc1, p in loc2, u in level: c[i,j] * x[i,j] + x[m, n] * x[o, p] * adj[u, n, p] * rev[u, m, o]} -> max;<br class=""><span class="" style="white-space: pre-wrap;"> </span><br class=""></span><div class="">But also this objective function is not ideal because the amount of iteration is quit high.</div><div class=""><br class=""></div><div class="">Cheers,</div><div class=""><br class=""></div><div class="">Mike</div><div class=""><br class=""></div><div class=""><br class=""></div><div class=""><br class=""><div class=""><blockquote type="cite" class=""><div class="">Am 03.12.2014 um 18:45 schrieb Indrajit Sen Gupta <<a href="mailto:indrajitsg@gmail.com" target="_blank" class="">indrajitsg@gmail.com</a>>:</div><div class=""><div class=""><br class=""><div class=""><div dir="ltr" class=""><div class="">Mike,</div><div class=""> </div><div class="">In Windows also, I am seeing CMPL crash. I am using Windows 7 64bit edition. When it crashes, a dialogue box appears saying cmpl.exe has stopped working. In view problem details, I see this:</div><div class=""> </div><div class=""><font face="monospace" class="">Problem signature:<br class=""> Problem Event Name: APPCRASH<br class=""> Application Name: cmpl.exe<br class=""> Application Version: 0.0.0.0<br class=""> Application Timestamp: 53aaecc8<br class=""> Fault Module Name: cmpl.exe<br class=""> Fault Module Version: 0.0.0.0<br class=""> Fault Module Timestamp: 53aaecc8<br class=""> Exception Code: c0000005<br class=""> Exception Offset: 0001a9d0<br class=""> OS Version: 6.1.7601.2.1.0.256.4<br class=""> Locale ID: 1033<br class=""> Additional Information 1: 0a9e<br class=""> Additional Information 2: 0a9e372d3b4ad19135b953a78882e789<br class=""> Additional Information 3: 0a9e<br class=""> Additional Information 4: 0a9e372d3b4ad19135b953a78882e789</font></div><div class=""> </div><div class="">Let me know if you need any more information.</div><div class=""><br class="">Regards,</div><div class="">Indrajit</div></div><div class="gmail_extra"><br class=""><div class="gmail_quote">On Wed, Dec 3, 2014 at 9:35 PM, Mike Steglich<span class="Apple-converted-space"> </span><span dir="ltr" class=""><<a href="mailto:mike.steglich@th-wildau.de" target="_blank" class="">mike.steglich@th-wildau.de</a>></span><span class="Apple-converted-space"> </span>wrote:<br class=""><blockquote class="gmail_quote" style="margin: 0px 0px 0px 0.8ex; padding-left: 1ex; border-left-color: rgb(204, 204, 204); border-left-width: 1px; border-left-style: solid;"><div class="" style="word-wrap: break-word;">Hi Indrajit,<div class=""><br class=""></div><div class="">Thank you for reporting this bug. We will debug it it in the next couple of days. </div><div class=""><br class=""></div><div class="">In the meantime please use Cmpl for Mac or Windows. Your problem is running on both systems and it requires apr. 1 GB RAM. </div><div class=""><br class=""></div><div class="">Cheers,</div><div class=""><br class=""></div><div class="">Mike<br class=""><div class=""><blockquote type="cite" class=""><div class="">Am 03.12.2014 um 13:47 schrieb Indrajit Sen Gupta <<a href="mailto:indrajitsg@gmail.com" target="_blank" class="">indrajitsg@gmail.com</a>>:</div><div class=""><div class=""><br class=""><div class=""><div dir="ltr" class=""><div class="">Hi Mike,</div><div class=""> </div><div class="">Thanks for the input. I realized that non linearity is what is causing all that problem. We are trying to get access to CPLEX from our client side, but there are some IT related issues which is causing the delay. I installed the 64 bit CMPL on a Linux server and tried to run it on the full problem (56 x 56 decision variables) and here is the output that I get:</div><div class=""> </div><div class="">CMPL model generation - running</div><div class="">CMPL version: 1.10.0<br class="">Authors: Thomas Schleiff, Mike Steglich<br class="">Distributed under the GPLv3</div><div class="">create model instance ...<br class="">cmpl: malloc.c:2842: mremap_chunk: Assertion `((size + offset) & (_rtld_global_ro._dl_pagesize - 1)) == 0' failed.<br class="">/usr/bin/cmpl: line 115: 19491 Aborted (core dumped) $dirname/bin/$appname "$cmplFile" "${cArg[1]}" "${cArg[2]}" "${cArg[3]}" "${cArg[4]}" "${cArg[5]}" "${cArg[6]}" "${cArg[7]}" "${cArg[8]}" "${cArg[9]}" "${cArg[10]}" "${cArg[11]}" "${cArg[12]}" "${cArg[13]}" "${cArg[14]}" "${cArg[15]}" "${cArg[16]}" "${cArg[17]}" "${cArg[18]}" "${cArg[19]}" "${cArg[20]}"<br class=""></div><div class="">Is this a limitation of the architecture?</div><div class=""> </div><div class="">Regards,</div><div class="">Indrajit</div><div class=""> </div></div><div class="gmail_extra"><br class=""><div class="gmail_quote">On Wed, Dec 3, 2014 at 3:26 PM, Mike Steglich<span class="Apple-converted-space"> </span><span dir="ltr" class=""><<a href="mailto:mike.steglich@th-wildau.de" target="_blank" class="">mike.steglich@th-wildau.de</a>></span><span class="Apple-converted-space"> </span>wrote:<br class=""><blockquote class="gmail_quote" style="margin: 0px 0px 0px 0.8ex; padding-left: 1ex; border-left-color: rgb(204, 204, 204); border-left-width: 1px; border-left-style: solid;"><div class=""><div class=""><div class="" style="word-wrap: break-word;">Hi Indrajit,<br class=""><div class=""><div class=""><div class="" style="word-wrap: break-word;"><div class=""><br class=""></div><div class="">First of all ... I would like to suggest to use a cmplData file instead a Cmpl file to read your data in your Cmpl model. CmplData is the official data file format for CMPL. Please take a look at the attached files that I have created for your problem.</div><div class=""><br class=""></div><div class=""></div></div></div></div></div></div></div><br class=""><div class="" style="word-wrap: break-word;"><div class=""><div class=""><div class="" style="word-wrap: break-word;"><div class=""></div></div></div></div></div><br class=""><div class="" style="word-wrap: break-word;"><div class=""><div class=""><div class="" style="word-wrap: break-word;"><div class=""></div><div class=""><br class=""></div><div class="">The cause of the huge effort to solve your problem are the products of the variables in your objective function:</div><div class=""><br class=""></div><div class=""><span class="" style="white-space: pre-wrap;"> </span><i class="">revenue: sum{i in depts, j in locs, m in depts, o in depts, n in loc1, p in loc2, u in level: <br class=""><span class="" style="white-space: pre-wrap;"> </span>c[i,j] * x[i,j] + <br class=""><span class="" style="white-space: pre-wrap;"> </span><b class="">x[m, n] * x[o, p]</b><span class="Apple-converted-space"> </span>* adj[u, n, p] * rev[u, m, o]<br class=""><span class="" style="white-space: pre-wrap;"> </span>} -> max;</i></div><div class=""><br class=""></div><div class="">This is a non-linear term. Cmpl reformulates such products of binary variables equivalently by a set of in-equations. Please take a look at the pages 46ff in the manual. The size of the model after the reformulations isn't very huge but the structure is quite complicated for the solver.</div><div class=""><br class=""></div><div class="">Isn't there a different way to formulate your model and to avoid products of variables. It seems that it is a multistage transportation model, for that it could be possible to find alternative formulations. </div><div class=""><br class=""></div><div class="">If you can't reformulate it then I would like to propose to use Cplex or Gurobi. You can obtain a free version via the IBM academic initiative or via the Gurobi web page. </div><div class=""><a href="https://www.ibm.com/developerworks/community/blogs/jfp/entry/cplex_studio_in_ibm_academic_initiative?lang=en" target="_blank" class="">https://www.ibm.com/developerworks/community/blogs/jfp/entry/cplex_studio_in_ibm_academic_initiative?lang=en</a></div><div class=""><a href="http://www.gurobi.com/products/licensing-and-pricing/academic-licensing" target="_blank" class="">http://www.gurobi.com/products/licensing-and-pricing/academic-licensing</a></div><div class=""><br class=""></div><div class="">For both solvers Cmpl's solutionPool feature can be used that can be combined with a mip gap to decrease the computation times. </div><div class="">You can use the following Cmpl header entries for Cplex:</div><div class=""><div class=""><i class="">%arg -solver cplex</i></div><div class=""><i class="">%opt cplex mip/tolerances/mipgap 0.10</i></div><div class=""><i class="">%display solutionPool</i></div></div><div class=""><br class=""></div><div class=""><br class=""></div><div class="">Cheers,</div><div class=""><br class=""></div><div class="">Mike</div><div class=""><br class=""></div><div class=""> </div><div class=""><br class=""></div><div class=""><br class=""></div><div class=""><br class=""></div><div class=""><br class=""><div class=""><blockquote type="cite" class=""><div class="">Am 03.12.2014 um 03:00 schrieb Indrajit Sen Gupta <<a href="mailto:indrajitsg@gmail.com" target="_blank" class="">indrajitsg@gmail.com</a>>:</div><br class=""><div class=""><div dir="ltr" class=""><div class="">The optimizer finally completed after about 5.3 hours. Attached are the files. It is a store space optimization problem which I am trying to solve. As a proof of concept, this data has been reduced to 1/5 th of the actual problem.</div><div class=""> </div><div class="">Is there way to reduce the time it takes or generate intermediate outputs so that we don't have to wait till it completes?</div><div class=""> </div><div class="">Regards,</div><div class="">Indrajit</div><div class=""> </div></div><div class="gmail_extra"><br class=""><div class="gmail_quote">On Wed, Dec 3, 2014 at 2:34 AM, Mike Steglich<span class="Apple-converted-space"> </span><span dir="ltr" class=""><<a href="mailto:mike.steglich@th-wildau.de" target="_blank" class="">mike.steglich@th-wildau.de</a>></span><span class="Apple-converted-space"> </span>wrote:<br class=""><blockquote class="gmail_quote" style="margin: 0px 0px 0px 0.8ex; padding-left: 1ex; border-left-color: rgb(204, 204, 204); border-left-width: 1px; border-left-style: solid;"><div dir="auto" class=""><div class="">Hi Indrajit,</div><div class=""><br class=""></div><div class="">Can you send the model for a better understanding?</div><div class=""><br class=""></div><div class="">Thanks,</div><div class=""><br class=""></div><div class="">Mike<br class=""><br class=""><br class=""></div><div class=""><br class="">Am 02.12.2014 um 17:38 schrieb Indrajit Sen Gupta <<a href="mailto:indrajitsg@gmail.com" target="_blank" class="">indrajitsg@gmail.com</a>>:<br class=""><br class=""></div><div class=""><div class=""><blockquote type="cite" class=""><div class=""><div dir="ltr" class=""><div class="">Hi Mike,</div><div class=""> </div><div class="">I am running CMPL on a small version of very big problem I need to solve. The current problem has 100 binary variables and about 20 constraints. The objective function is a bit non linear as it has a term x[i,j] * x[k, m]. The program has been running for about 3 hours now and the output is showing:</div><div class=""> </div><div class=""><font face="monospace" class="">After 20300 nodes, 5239 on tree, -51762900 best solution, best possible -62975151 (10407.49 seconds)</font></div><div class=""><font face="Courier New" class=""></font> </div><div class=""><font face="arial,helvetica,sans-serif" class="">Any idea how much time it will take to complete? I understand, with binary variables it is difficult to predict, but supposing I were to stop in mid way, is there any way to get the current best solution?</font></div><div class=""> </div><div class="">Regrads,</div><div class="">Indrajit</div></div></div></blockquote></div></div><blockquote type="cite" class=""><div class=""><span class="">_______________________________________________</span><br class=""><span class="">Cmpl mailing list</span><br class=""><span class=""><a href="mailto:Cmpl@list.coin-or.org" target="_blank" class="">Cmpl@list.coin-or.org</a></span><br class=""><span class=""><a href="http://list.coin-or.org/mailman/listinfo/cmpl" target="_blank" class="">http://list.coin-or.org/mailman/listinfo/cmpl</a></span></div></blockquote></div></blockquote></div><br class=""></div><span class=""><prob008.cmpl></span><span class=""><prob008data.cmpl></span></div></blockquote></div><br class=""></div></div></div></div><br class=""></div><br class="">_______________________________________________<br class="">Cmpl mailing list<br class=""><a href="mailto:Cmpl@list.coin-or.org" target="_blank" class="">Cmpl@list.coin-or.org</a><br class=""><a href="http://list.coin-or.org/mailman/listinfo/cmpl" target="_blank" class="">http://list.coin-or.org/mailman/listinfo/cmpl</a><br class=""></blockquote></div><br class=""></div>_______________________________________________<br class="">Cmpl mailing list<br class=""><a href="mailto:Cmpl@list.coin-or.org" target="_blank" class="">Cmpl@list.coin-or.org</a><br class=""><a href="http://list.coin-or.org/mailman/listinfo/cmpl" target="_blank" class="">http://list.coin-or.org/mailman/listinfo/cmpl</a></div></div></div></blockquote></div><br class=""></div></div></blockquote></div><br class=""></div></div></div></div></blockquote></div><br class=""></div></div></blockquote></div><br class=""></div>_______________________________________________<br class="">Cmpl mailing list<br class=""><a href="mailto:Cmpl@list.coin-or.org" target="_blank" class="">Cmpl@list.coin-or.org</a><br class=""><a href="http://list.coin-or.org/mailman/listinfo/cmpl" target="_blank" class="">http://list.coin-or.org/mailman/listinfo/cmpl</a></div></div></div></blockquote></div><br class=""></div></div></blockquote></div><br class=""></div>_______________________________________________<br class="">Cmpl mailing list<br class=""><a href="mailto:Cmpl@list.coin-or.org" target="_blank" class="">Cmpl@list.coin-or.org</a><br class=""><a href="http://list.coin-or.org/mailman/listinfo/cmpl" target="_blank" class="">http://list.coin-or.org/mailman/listinfo/cmpl</a></div></div></div></blockquote></div><br class=""></div></blockquote></div><br class=""></div><span id="cid:AA642B27-2CE2-495A-91AF-3B303970E678" class=""><screenshot2.png></span></div></blockquote></div><br class=""></div><span style="font-family: Helvetica; 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