[Cmpl] Fwd: Error connecting to CPLEX
Indrajit Sen Gupta
indrajitsg at gmail.com
Sun Nov 23 12:49:38 EST 2014
Hi Mike,
This example is from your manual:
--------------------------------------------------------------
%arg -solver cbc
parameters:
c[] := (1,2,3);
b[] := (15,20);
A[,] := ((5.6, 7.7, 10.5),
(9.8, 4.2, 11.1));
variables:
x[defset(c[])] : real[0..];
objectives:
c[]T * x[] -> max;
constraints:
A[,] * x[] <= b[];
--------------------------------------------------------------
Regards,
Indrajit
On Sun, Nov 23, 2014 at 10:40 PM, Mike Steglich <mike.steglich at th-wildau.de>
wrote:
> Hi Indrajit,
>
> Could try to solve it with Cbc and could you also send your model so that
> I can check it?
>
> Cheers,
>
> Mike
>
>
>
> Am 23.11.2014 um 18:06 schrieb Indrajit Sen Gupta <indrajitsg at gmail.com>:
>
> Hi Mike,
>
> I did as you said. Here is what I did after installing Cmpl in C:\Program
> Files (x86)\.
>
> 1. Copied the CPLEX folder containing cplex.exe and cplex1260.dll inside
> \Cmpl\bin\
> 2. In cmpl.opt, I put: CplexFileName = CPLEX/cplex.exe
>
> I no longer get "can not connect the solver message". What I get is:
>
>
> ----------------------------------------------------------------------------------------
> Cmpl: cmpl prob04.cmpl
> CMPL model generation - running
> CMPL version: 1.10.0
> Authors: Thomas Schleiff, Mike Steglich
> Distributed under the GPLv3
> create model instance ...
> write model instance ...
> CMPL model generation - finished
> Solver - running
> Error (interfaces): cplex failed - exit code ☺
>
> ----------------------------------------------------------------------------------------
>
> Regards,
> Indrajit
>
>
> On Sun, Nov 23, 2014 at 3:43 PM, Mike Steglich <mike.steglich at berlin.de>
> wrote:
>
>> Hi Indrajit,
>>
>> Please install Cmpl in c:\program files\Cmpl (for win32) or in
>> c:\program files (x86)\Cmpl (under win64) and use the .bat files
>> (coliop.bat, cmplShell.bat, cmpl.bat) in the root of the Cmpl installation
>> folder. I would like to suggest to use either Coliop for having a simple UI
>> or CmplShell.bat to use Cmpl on the command line. All of these simple
>> scripts set the environment for Cmpl. The intention was to prevent that a
>> Cmpl user has to set a couple of environment variables on his/her own and
>> not to change the original windows setting.
>>
>> If you use the Cmpl binary or the Coliop jar file directly then it fails
>> as we have seen for your problems to invoke Cplex an Scip.
>>
>> Please take a look at the installation hints at coliop.org/download.html
>> or in the manual.
>>
>> Thanks,
>>
>> Mike
>>
>>
>>
>> Am 23.11.2014 um 03:23 schrieb Indrajit Sen Gupta <indrajitsg at gmail.com>:
>>
>> Hi Mike,
>>
>> Here is something that I noticed when executing a CMPL problem with the
>> default options. The first 27 lines of output that comes out:
>>
>>
>> ---------------------------------------------------------------------------------------------------
>> Cmpl: cmpl prob04.cmpl
>> CMPL model generation - running
>> CMPL version: 1.10.0
>> Authors: Thomas Schleiff, Mike Steglich
>> Distributed under the GPLv3
>> create model instance ...
>> write model instance ...
>> CMPL model generation - finished
>> Solver - running
>> Welcome to the CBC MILP Solver
>> Version: 2.8.8
>> Build Date: Dec 21 2013
>> Revision Number: 1998
>> command line - C:\Program Files (x86)\Cmpl\bin\..\Thirdparty\CBC\cbc
>> prob04.mps max solve gsolu prob04.gsol (default strategy 1)
>> At line 2 NAME prob04.cmpl
>> At line 3 ROWS
>> At line 7 COLUMNS
>> At line 16 RHS
>> At line 18 RANGES
>> At line 19 BOUNDS
>> At line 23 ENDATA
>> Problem prob04.cmpl has 2 rows, 3 columns and 6 elements
>>
>> ---------------------------------------------------------------------------------------------------
>>
>> Notice the line 19 which starts of with: command line - C:\Program
>> File (x86) ....
>>
>> Here is my question. I did not install CMPL in Program Files, instead in
>> D:\DPF\CMPL. So why should the command line start with C:\... Any thoughts.
>>
>> Regards,
>> Indrajit
>>
>>
>> On Sun, Nov 23, 2014 at 12:07 AM, Indrajit Sen Gupta <
>> indrajitsg at gmail.com> wrote:
>>
>>> Hi Mike,
>>>
>>> You are right. I will stick with CBC. All this started when I tried to
>>> connect to CPLEX. SCIP was just another optimizer that I downloaded to
>>> figure out why this problem is happening.
>>>
>>> Thanks for your help anyway.
>>>
>>> Regards,
>>> Indrajit
>>>
>>>
>>> On Sun, Nov 23, 2014 at 12:00 AM, Mike Steglich <mike.steglich at berlin.de
>>> > wrote:
>>>
>>>> Hi Indraji,
>>>>
>>>> I'm not sure why scip is not working with Cmpl on your system with a
>>>> setting that seems fine. It sounds a bit like Murphy's Law. The hardcore
>>>> workarround is to copy all scip files into Cmpl/bin and remove the path in
>>>> the scip entry in cmpl.opt.
>>>>
>>>> Why don't you use Cbc? The performance is similar to Scip.
>>>>
>>>> Cheers,
>>>>
>>>> Mike
>>>>
>>>>
>>>>
>>>>
>>>> Am 22.11.2014 um 19:07 schrieb Indrajit Sen Gupta <indrajitsg at gmail.com
>>>> >:
>>>>
>>>> Hi Mike,
>>>>
>>>> SCIP works out of the box. I am using command line for all purposes.
>>>> But here is the funny thing. I exported the problem from CMPL to MPS format
>>>> and ran it through SCIP and got a sub optimal solution!!! I am not familiar
>>>> with SCIP - just read the mps file and entered optimize. Its actually a
>>>> small text book problem and the results shouldn't be different.
>>>>
>>>> Regards,
>>>> Indrajit
>>>>
>>>>
>>>> On Sat, Nov 22, 2014 at 11:12 PM, Mike Steglich <
>>>> mike.steglich at th-wildau.de> wrote:
>>>>
>>>>>
>>>>>
>>>>> Anfang der weitergeleiteten Nachricht:
>>>>>
>>>>> *Von: *Mike Steglich <mike.steglich at th-wildau.de>
>>>>> *Betreff: **Aw: [Cmpl] Error connecting to CPLEX*
>>>>> *Datum: *22. November 2014 18:42:16 MEZ
>>>>> *An: *Indrajit Sen Gupta <indrajitsg at gmail.com>
>>>>>
>>>>> Hi Indrajit,
>>>>>
>>>>> Framework is still in the (temporary) search path if you use
>>>>> Coliop.bat or cmplShell.bat. Does scip work out of the box w/o Cmpl?
>>>>>
>>>>> Cheers,
>>>>>
>>>>> Mike
>>>>>
>>>>>
>>>>> Am 22.11.2014 um 18:36 schrieb Indrajit Sen Gupta <
>>>>> indrajitsg at gmail.com>:
>>>>>
>>>>> Still no luck. :( Copied all the dlls and lib files to the Frameworks
>>>>> folder. I made sure that Frameworks is in search path. Am giving up for
>>>>> tonight.
>>>>>
>>>>> Regards,
>>>>> Indrajit
>>>>>
>>>>>
>>>>> On Sat, Nov 22, 2014 at 10:45 PM, Mike Steglich <
>>>>> mike.steglich at th-wildau.de> wrote:
>>>>>
>>>>>> The entry *ScipFileName =
>>>>>> ../Thirdparty/scip/scip-3.1.0.win.x86.msvc.opt.spx.ld.exe* is fine.
>>>>>>
>>>>>> As mentioned before, please move the required libs
>>>>>> (scip-3.1.0.win.x86.msvc.opt.spx.ld.dll and
>>>>>> scip-3.1.0.win.x86.msvc.opt.spx.ld.lib) into Cmpl/Frameworks …
>>>>>>
>>>>>> Am 22.11.2014 um 18:08 schrieb Indrajit Sen Gupta <
>>>>>> indrajitsg at gmail.com>:
>>>>>>
>>>>>> These are the three files that I have in /Thirdparty/SCIP/
>>>>>>
>>>>>> scip-3.1.0.win.x86.msvc.opt.spx.ld.dll
>>>>>> scip-3.1.0.win.x86.msvc.opt.spx.ld.exe
>>>>>> scip-3.1.0.win.x86.msvc.opt.spx.ld.lib
>>>>>>
>>>>>> And this is the line in /bin/cmpl.opt
>>>>>>
>>>>>> ScipFileName =
>>>>>> ../Thirdparty/SCIP/scip-3.1.0.win.x86.msvc.opt.spx.ld.exe
>>>>>>
>>>>>> Regards,
>>>>>> Indrajit
>>>>>>
>>>>>>
>>>>>>
>>>>>> On Sat, Nov 22, 2014 at 10:20 PM, Mike Steglich <
>>>>>> mike.steglich at th-wildau.de> wrote:
>>>>>>
>>>>>>> The following entries are working on my Windows test system:
>>>>>>>
>>>>>>> CbcPath = ../Thirdparty/CBC/
>>>>>>> GlpkPath = ../Thirdparty/GLPK/
>>>>>>> ScipFileName = ../Thirdparty/scip/scip.exe
>>>>>>> CplexFileName =
>>>>>>>
>>>>>>>
>>>>>>> It works as expected when I include the CMPL header entry *%arg
>>>>>>> -solver scip* in my model.
>>>>>>>
>>>>>>> Please copy the required DLLs into CMPL/Frameworks or in another
>>>>>>> folder that is in the search path.
>>>>>>>
>>>>>>> This should work similar for Cplex.
>>>>>>>
>>>>>>> Cheers,
>>>>>>>
>>>>>>> Mike
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>> Am 22.11.2014 um 16:41 schrieb Indrajit Sen Gupta <
>>>>>>> indrajitsg at gmail.com>:
>>>>>>>
>>>>>>> I tried all of the above and some more - but none worked.
>>>>>>>
>>>>>>> I tried putting ../../ before the path to filename. So the full path
>>>>>>> would look like: ../../AMPL/ampl/cplex.exe
>>>>>>>
>>>>>>> I even copied cplex.exe and cplex1260.dll into a folder under
>>>>>>> Thirdparty and tried running it with filename path as:
>>>>>>> ../Thirdparty/CPLEX/cplex.exe
>>>>>>>
>>>>>>> Regards,
>>>>>>> Indrajit
>>>>>>>
>>>>>>>
>>>>>>> On Sat, Nov 22, 2014 at 3:02 PM, Mike Steglich <
>>>>>>> mike.steglich at th-wildau.de> wrote:
>>>>>>>
>>>>>>>> Hi Indrajit,
>>>>>>>>
>>>>>>>> It is unfortunately not possible to use drive letters to specify
>>>>>>>> where Cplex is located. Furthermore please use / instead of \. e.g.
>>>>>>>> /DPF/Ampl/ampl/cplex.exe.
>>>>>>>>
>>>>>>>> Cheers,
>>>>>>>>
>>>>>>>> Mike
>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>>> > Am 22.11.2014 um 09:29 schrieb Kamil Figiela <kfigiela at agh.edu.pl
>>>>>>>> >:
>>>>>>>> >
>>>>>>>> > Probably it should say:
>>>>>>>> >
>>>>>>>> > CplexFileName = D:\DPF\AMPL\ampl\cplex.exe
>>>>>>>> >
>>>>>>>> > Best,
>>>>>>>> > Kamil
>>>>>>>> >
>>>>>>>> >> Wiadomość napisana przez Indrajit Sen Gupta <
>>>>>>>> indrajitsg at gmail.com> w dniu 22 lis 2014, o godz. 05:56:
>>>>>>>> >>
>>>>>>>> >> Hi Mike,
>>>>>>>> >>
>>>>>>>> >> I have a CPLEX demo version which came with AMPL demo version. I
>>>>>>>> tried to use this solver with the option:
>>>>>>>> >>
>>>>>>>> >> %arg -solver cplex
>>>>>>>> >>
>>>>>>>> >> and with the following line in cmpl.opt file:
>>>>>>>> >>
>>>>>>>> >> CplexFileName = D:\DPF\AMPL\ampl\
>>>>>>>> >>
>>>>>>>> >> This is the path to the folder where cplex.exe is located. When
>>>>>>>> I try to execute a model it says
>>>>>>>> >>
>>>>>>>> >> Error (interfaces): can not connect the solver: Cplex ->
>>>>>>>> >>
>>>>>>>> >> Any idea why this is happening?
>>>>>>>> >>
>>>>>>>> >> Regards,
>>>>>>>> >> Indrajit
>>>>>>>> >>
>>>>>>>> >> _______________________________________________
>>>>>>>> >> Cmpl mailing list
>>>>>>>> >> Cmpl at list.coin-or.org
>>>>>>>> >> http://list.coin-or.org/mailman/listinfo/cmpl
>>>>>>>> >
>>>>>>>> >
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>>>>>
>>>>>
>>>>>
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