[Cmpl] Error connecting to CPLEX

Mike Steglich mike.steglich at th-wildau.de
Thu Jan 1 12:32:23 EST 2015 

Hi Oscar,

Happy new year to you and all Cmpl user.

CPLEX can be connected to CMPL by changing the entry CplexFileName in the file <cmplhome>/bin/cmpl.opt. 

Cheers,

Mike

> Am 01.01.2015 um 11:10 schrieb Oscar Augusto Téllez Sánchez <oskarts at gmail.com>:
> 
> 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
>>>>>>>>>>>>>>>>>>> >>
>>>>>>>>>>>>>>>>>>> >> _______________________________________________
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>>>>>>>>>>>>>>>>>>> >
>>>>>>>>>>>>>>>>>>> >
>>>>>>>>>>>>>>>>>>> > _______________________________________________
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>>>>>>>>>>>>>>>>>> 
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