[Cmpl] Fwd: Error connecting to CPLEX

Sat Nov 22 13:37:43 EST 2014

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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