[Cmpl] Fwd: Error connecting to CPLEX

Indrajit Sen Gupta indrajitsg at gmail.com
Sun Nov 23 12:06:02 EST 2014 

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
>>>>>>> >> http://list.coin-or.org/mailman/listinfo/cmpl
>>>>>>> >
>>>>>>> >
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>>>>>>
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