[Cmpl] Error connecting to CPLEX

Indrajit Sen Gupta indrajitsg at gmail.com
Thu Jan 1 06:39:11 EST 2015 

Oscar,

Where have you installed CMPL?

Indrajit

On Thu, Jan 1, 2015 at 3:40 PM, Oscar Augusto Téllez Sánchez <
oskarts at gmail.com> wrote:

> Hi I am trying to solve a problem with Cplex..but i got this error
>
> Error (interfaces): can not connect the solver: Cplex
> ->/Applications/IBM/ILOG/CPLEX_Studio125/cplex/bin/x86-64_darwin/cplex
>
> It seems, he can’t find the solver. Actually it is installed
> on myDisk/Users/oscar/Applications/IBM…
>
> How can i change the address when invoking the solver through cmpl?
>
> or do i have to reinstall in the given address?
>
> thank you in advance and happy new year!
>
> Oscar
>
>
>
> On 23 Nov 2014, at 19:06, Indrajit Sen Gupta <indrajitsg at gmail.com> wrote:
>
> 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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