[Cmpl] Problems with other solvers

Thu Mar 25 13:18:40 EDT 2021

Hi Mike,

there are no specific characters in the path of the programs nor in the
path of the file, apart from the directory Lokaler Datenträger (C:). I
changed the name of the directory C:, but this didn't help either. I also
tried to change from backslash to slash inside the path..

I am trying to install all of the software on another computer in the Home
directory, but as there are now programs in my Home folder at the moment, I
don't think this will change anything.

Given the fact that Cplex is running on its own aswell, I am also able to
reach my goals without calling Cplex from Coliop. So I think I will use the
export to free mps feature to use Cplex.

Thanks,
Hendrik

Am Do., 25. März 2021 um 12:41 Uhr schrieb <mike.steglich at th-wildau.de>:

> Hi Hendrik.
>
>
>
> Hmm ... I tried to solve your problem also with Cplex 20.1 using the
> following entry in cmpl.opt.
>
> CplexFileName = \Program
> Files\IBM\ILOG\CPLEX_Studio201\cplex\bin\x64_win64\cplex.exe
>
>
>
> I am able to find a solution.
>
>
>
> Are there some specific characters in your path and/or filename. (e.g. the
> German ö,Ü etc.)? Another issue could be a mapped drive. We have some
> problems with Cmpl in the computer labs of our university in which the
> students have a network drive which is mapped to the Home folder.
>
>
>
> Thanks,
>
>
>
> Mike
>
>
>
>
>
> *Von:* Hendrik Titgemeyer <hendrik2702 at gmail.com>
> *Gesendet:* 25 March 2021 09:12
> *An:* mike.steglich at th-wildau.de
> *Cc:* cmpl at list.coin-or.org
> *Betreff:* Re: [Cmpl] Problems with other solvers
>
>
>
> Hi Mike,
>
>
>
> thank you very much for the quick reply and the helpful information!
>
>
>
> Gurobi and the SCIP Solver are now working as well. Only the Cplex Solver
> has the same output as before, even though the cmpl.opt file for Cplex is
> just the same as yours. I think Coliop calls Cplex, but Cplex is not able
> to read the produced file:
>
>
>
> *CMPL model generation - finished*
>
> *Solver - running*
>
>
>
> *Welcome to IBM(R) ILOG(R) CPLEX(R) Interactive Optimizer 20.1.0.0*
>
> *with Simplex, Mixed Integer & Barrier Optimizers*
>
> *5725-A06 5725-A29 5724-Y48 5724-Y49 5724-Y54 5724-Y55 5655-Y21*
>
> *Copyright IBM Corp. 1988, 2020. All Rights Reserved.*
>
>
>
> *Type 'help' for a list of available commands.*
>
> *Type 'help' followed by a command name for more*
>
> *information on commands.*
>
>
>
> *CPLEX> Cannot interpret file type.*
>
>
>
> *File type options:*
>
>
>
> *ann Model Annotations*
>
> *bas INSERT format basis file*
>
> *flt Solution pool filters*
>
> *lp LP format problem file*
>
> *min DIMACS min-cost network-flow format file*
>
> *mps MPS format problem file*
>
> *mst MIP start file*
>
> *net CPLEX network-flow format file*
>
> *ord Integer priority order file*
>
> *prm Non-default parameter file*
>
> *sav Binary matrix and basis file*
>
> *sol Solution file*
>
> *vmc Virtual Machine Configuration*
>
>
>
>
>
> *File type: No problem exists.*
>
>
>
> *No file read.*
>
>
>
>
>
> I already reinstalled Cplex, but the output is the same.
>
> As you suggested, I saved the problem file as a free MPS file and I was
> able to run this in CPLEX. So with this procedure I can use CPLEX as well.
>
>
>
> With kind regards,
>
>
>
> Hendrik
>
>
>
>
>
>
>
> Am Mi., 24. März 2021 um 12:23 Uhr schrieb <mike.steglich at th-wildau.de>:
>
> Hi Hendrik,
>
>
>
> Thank you for being interested in CMPL.
>
>
>
> In Cmpl 1.12 is actually a bug regarding Gurobi. Please copy the files you
> can download from
> https://nextcloud.th-wildau.de/nextcloud/index.php/s/Y2S5jWenQAFkT4q  in
> Cmpl/bin to exchange the existing files.
>
>
>
> For Cplex and Scip you need to edit Cmpl/bin/cmpl.opt. The following works
> on my system:
>
>
>
> CbcPath =
>
> GlpkPath =
>
> ScipFileName = scip.exe
>
> CplexFileName = \Program
> Files\IBM\ILOG\CPLEX_Studio1210\cplex\bin\x64_win64\cplex.exe
>
>
>
> I have copied the scip files into Cmpl/bin (scip.exe, libscip.dll,
> tbb.dll). Therefore, the Scip entry is only -> scip.exe.
>
>
>
> With the Gurobi patch and the entries in cmpl.opt, your problem ran
> without problems on my system.
>
>
>
> To generate a Free Mps file you need to use the command line argument -fm
> instead -m. -m is for classical MPS which cannot proceed longer names for
> columns and rows.
>
>
>
> Please let me know, whether my hints work for you.
>
>
>
> Thanks,
>
>
>
> Mike
>
>
>
>
>
>
>
>
>
>
>
> *Von:* Cmpl <cmpl-bounces at coin-or.org> *Im Auftrag von *Hendrik Titgemeyer
> *Gesendet:* 24 March 2021 09:02
> *An:* cmpl at list.coin-or.org
> *Betreff:* [Cmpl] Problems with other solvers
>
>
>
> Hi,
>
>
>
> I have problems solving a VRPTW with Gurobi, CPLEX, SCIP and GLPK. My goal
> is to compare these solvers for which reason the CMPL package is perfect. I
> use the Coliop IDE to create the model and I have already solved the
> problem with the CBC solver, so it should be feasible.
>
>
>
> When I use Gurobi, the solver can't find the produced mps file and the
> issue with Cplex is that the solver is called but can't read the produced
> file. I have an academic license for Gurobi and CPLEX, so that might be a
> problem, but the other solvers also don't run, even though the path is
> listed in the file Cmpl/bin/cmpl.opt.
>
>
>
> I've read in the Cmpl Archive that copying the .exe/.dll/.lib files from
> Gurobi, CPLEX etc. in the Cmpl folder might help, but this is not working
> as well. I've also read about using the Coliop.bat file, which is not
> existing in the current 1.12.0 version. Cmpl is installed in *Programme
> (x86)*, while the solvers are installed in *Programme.*
>
>
>
> A second solution for my problem is to export mps files and solve them
> manually within Gurobi etc., but the command results in an error, because
> of the length of a constraint:  cmplShell.bat has the following output
>
>
>
> "Cmpl: cmpl C:/Dokumente/(...)/Coliop/VRPTW_Vorlage.cmpl -m C:/Dokumente
> Studium/Bachelorarbeit/Coliop/VRPTW_Vorlage.mps
> fatal error: file C:/Dokumente/(...)/Coliop/VRPTW_Vorlage.cmpl line 81:
> Line name 'line[100]' is too long"
>
>
>
> I hope you can help me with these problems! I attached my file to the mail.
>
>
>
> With kind regards,
>
> Hendrik
>
>
>
>
>
> In the following are the error messages:
>
> *Gurobi:*
>
> *write model instance ...*
>
> *CMPL model generation - finished*
>
> *Solver - running*
>
>
>
> *"C:/Dokumente/Studium/Bachelorarbeit/Coliop" "0"
> "C:/Users/Hendrik/AppData/Local/Temp/cmpl.H14308.mps"
> "C:/Users/Hendrik/AppData/Local/Temp/cmpl.H14308.gsol"*
>
>
>
> *Das System kann den angegebenen Pfad nicht finden.*
>
> *Error (interfaces): gurobi failed - exit code *
>
>
>
> *CPLEX:*
>
> *write model instance ...*
>
> *CMPL model generation - finished*
>
>
>
> *Solver - runningShell*
>
>
>
> *Welcome to IBM(R) ILOG(R) CPLEX(R) Interactive Optimizer Community
> Edition 12.10.0.0*
>
>
>
> *with Simplex, Mixed Integer & Barrier Optimizers*
>
>
>
> *5725-A06 5725-A29 5724-Y48 5724-Y49 5724-Y54 5724-Y55 5655-Y21*
>
>
>
> *Copyright IBM Corp. 1988, 2019. All Rights Reserved.*
>
>
>
>
>
> *Type 'help' for a list of available commands.*
>
>
>
> *Type 'help' followed by a command name for more*
>
>
>
> *information on commands.*
>
>
>
> *CPLEX> Cannot interpret file type.*
>
>
>
>
>
> *File type options:*
>
> *mps MPS format problem file (...)*
>
>
>
> *File type: No problem exists.*
>
>
>
> *No file read.*
>
>
>
> *SCIP/GLPK:*
>
> *write model instance ...*
>
> *CMPL model generation - finished*
>
>
>
> *Solver - running*
>
>
>
> *Error (interfaces): can not connect the solver: SCIP
> ->C:/Programme/SCIPOptSuite 7.0.1/bin/scip.exe*
>
>
>
>
>
>
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