[Cmpl] Fwd: Error connecting to CPLEX

Mike Steglich mike.steglich at th-wildau.de
Sun Nov 23 12:10:12 EST 2014 

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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