[Cmpl] Fwd: Error connecting to CPLEX

Indrajit Sen Gupta indrajitsg at gmail.com
Sun Nov 23 13:06:34 EST 2014 

I did. It is still the same. I get "cplex failed - exit code" message. Is
there any way to check why cplex failed?


On Sun, Nov 23, 2014 at 11:29 PM, Mike Steglich <mike.steglich at berlin.de>
wrote:

> Please move cplex1260.dll into Cmpl/Frameworks. Then it should work. This
> issues depend on the search path. The folder Cmpl\bin\Cplex is not in the
> search path and the DLL cannot be found.
>
>
>
> Am 23.11.2014 um 18:49 schrieb Indrajit Sen Gupta <indrajitsg at gmail.com>:
>
> 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
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>>>>>>>>> >
>>>>>>>>> >
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>>>>>>>>
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