[Cmpl] Fwd: Error connecting to CPLEX
Mike Steglich
mike.steglich at berlin.de
Sun Nov 23 05:13:23 EST 2014
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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>>>>>>>>>>>> >> Cmpl at list.coin-or.org
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>>>>>>>>>>>> >
>>>>>>>>>>>> >
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