[Cbc] solving time in C++ >> time in Gams
Christos
chtsolak at gmail.com
Wed Oct 10 10:37:52 EDT 2012
Ok i erased the other errors, Now there only two:
"error C1083: Cannot open precompiled header file: 'Release\test.pch':
No such file or directory" File stdafx.cpp
"error C1083: Cannot open precompiled header file: 'Release\test.pch':
No such file or directory" File test.cpp
On 10/10/2012 17:24, Christos wrote:
> I get the errors
> "error C1083: Cannot open precompiled header file:
> 'Release\test.pch': No such file or directory"
>
> and intellisense errors like this:
> " IntelliSense: cannot open source file "CbcBranchActual.hpp" "
>
>
> What's happening?
>
> On 10/10/2012 17:21, Iain Dunning wrote:
>> Compile everything in release mode - both the libraries and your
>> project.
>>
>> - Iain
>>
>> On Wed, Oct 10, 2012 at 10:20 AM, Christos <chtsolak at gmail.com
>> <mailto:chtsolak at gmail.com>> wrote:
>>
>> Yes you both were right. I have compiled libraries in debug mode.
>> Thank you.
>>
>> Now i compiled them in release mode, but i get 177 same errors:
>>
>> error LNK2038: mismatch detected for '_ITERATOR_DEBUG_LEVEL':
>> value '0' doesn't match value '2' in test.obj
>>
>> What's this?
>> (i am trying to compile project in debug mode)
>>
>>
>>
>> On 10/10/2012 16:59, Iain Dunning wrote:
>>> I wrote that guide.
>>> Is it possible you are building your program in "Debug" mode? If
>>> the lib files are large, it suggests they are being built with
>>> debugging information...
>>> Changing to "Release" mode could create speed ups of that order.
>>>
>>> Cheers,
>>> Iain
>>>
>>> On Wed, Oct 10, 2012 at 4:39 AM, Christos <chtsolak at gmail.com
>>> <mailto:chtsolak at gmail.com>> wrote:
>>>
>>> In order to help you help me i compiled my code with this
>>> method:https://projects.coin-or.org/Cbc/wiki/VSSetup
>>>
>>> And as i can see lib files from repository are much smaller
>>> then these created with the above method.
>>>
>>> Is this matter?
>>>
>>>
>>> On 9/10/2012 23:00, Christos wrote:
>>>> Very useful info!
>>>>
>>>> I downloaded Cbc-2.7.5-win64-intel11.1 and run cbc.exe in
>>>> the bin folder.
>>>> I used 2 methods-commands for solving, branchAndBound and
>>>> solve.
>>>>
>>>> They both solved it almost 10 times faster!!!
>>>>
>>>> Now, to come to a solution, i need to know what's the
>>>> differnece between solving with stand alone and simply by
>>>> calling the solver via my code which was implemented in MS
>>>> visual studio 2010..
>>>>
>>>> If you can help me with this, i would have find the
>>>> solution to my big problem!
>>>> I am waiting impatiently for your words.
>>>>
>>>> Thank you!
>>>>
>>>> On 9/10/2012 22:26, David Ibarra Gómez wrote:
>>>>> You can find the CBC binaries here:
>>>>> https://projects.coin-or.org/CoinBinary or (here
>>>>> http://www.coin-or.org/download/binary/Cbc/). You can test
>>>>> different versions
>>>>>
>>>>> From the shell you can call the executable binary. Then
>>>>> you just:
>>>>>
>>>>> 1. Import MPS file by just typing "import mpsfilename.mps"
>>>>> 2. and then you can solve it just typing "branchAndCut"
>>>>>
>>>>> Then compare the time to solve with the API.
>>>>>
>>>>> A random google search to find a "recipe" could be (at the
>>>>> end of page 6):
>>>>> http://wpweb2.tepper.cmu.edu/fmargot/coin/proj5.pdf
>>>>>
>>>>> Regards
>>>>>
>>>>>
>>>>>
>>>>> ------------------------------------------------------------------------
>>>>> Date: Tue, 9 Oct 2012 20:50:04 +0300
>>>>> From: chtsolak at gmail.com <mailto:chtsolak at gmail.com>
>>>>> To: dibarra21 at hotmail.com <mailto:dibarra21 at hotmail.com>
>>>>> CC: cbc at list.coin-or.org <mailto:cbc at list.coin-or.org>
>>>>> Subject: Re: [Cbc] solving time in C++ >> time in Gams
>>>>>
>>>>> i have the latest version, 2.7.7....
>>>>>
>>>>> I solve it by using the default cbc solver, (i am not
>>>>> getting involved in the solver) with this way:
>>>>>
>>>>> /solver1.loadProblem(numcols, numrows, start, index,
>>>>> value, collb, colub, obj, rowlb, rowub);
>>>>> CbcModel model(solver1);
>>>>> CbcMain0(model);
>>>>> const char * argv2[]={"DAS","-solve","-quit"}; //
>>>>> CbcMain1(3,argv2,model); /
>>>>>
>>>>> So, i do not think that it's ommiting the presolve step,
>>>>> am i wrong?
>>>>>
>>>>> Where can i find the latest version, and how can i load an
>>>>> mps file?
>>>>>
>>>>> Thank you
>>>>>
>>>>> On 9/10/2012 20:42, David Ibarra Gómez wrote:
>>>>>
>>>>> Hi,
>>>>>
>>>>> there are several things that can cause this:
>>>>>
>>>>> * different solvers version,
>>>>> * solving is a complex task: presolve (cuting
>>>>> planes, heuristics, ...) and then branch and bound
>>>>> (cut). If you omit the first part or you do not do
>>>>> exactly the same steps result could be different.
>>>>>
>>>>>
>>>>> Did you try to solve using CBC CLI (stand alone
>>>>> executable) ?
>>>>>
>>>>> Regards
>>>>>
>>>>> ------------------------------------------------------------------------
>>>>> Date: Tue, 9 Oct 2012 12:16:49 +0300
>>>>> From: chtsolak at gmail.com <mailto:chtsolak at gmail.com>
>>>>> To: cbc at list.coin-or.org <mailto:cbc at list.coin-or.org>
>>>>> Subject: [Cbc] solving time in C++ >> time in Gams
>>>>>
>>>>> Hi all again,
>>>>>
>>>>> I have 1 question for you, if i solve it, i won't
>>>>> bother you again :-P
>>>>>
>>>>> I am using cbc in order to make an executable via MS
>>>>> visual studio which solves a model.
>>>>> In order to solve it, takes 60 mins
>>>>>
>>>>> I have made the same problem with GAMS and solved it
>>>>> in 30 secs, 120 times faster!!
>>>>>
>>>>> Is it because of an error in modeling or due to the
>>>>> different interface? (exe-GAMS)
>>>>>
>>>>> Why is there this enormous difference?
>>>>>
>>>>>
>>>>> Thank you in advance.//
>>>>> //
>>>>> //
>>>>> /
>>>>> /
>>>>> _______________________________________________ Cbc
>>>>> mailing list Cbc at list.coin-or.org
>>>>> <mailto:Cbc at list.coin-or.org>
>>>>> http://list.coin-or.org/mailman/listinfo/cbc
>>>>>
>>>>>
>>>>
>>>
>>>
>>> _______________________________________________
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>>> Cbc at list.coin-or.org <mailto:Cbc at list.coin-or.org>
>>> http://list.coin-or.org/mailman/listinfo/cbc
>>>
>>>
>>>
>>>
>>> --
>>> *Iain Dunning*
>>> PhD Student
>>> <http://orc.scripts.mit.edu/people/student.php?name=idunning> /
>>> MIT Operations Research Center <http://web.mit.edu/orc/www/>
>>> www.iaindunning.com <http://www.iaindunning.com/>
>>>
>>
>>
>>
>>
>> --
>> *Iain Dunning*
>> PhD Student
>> <http://orc.scripts.mit.edu/people/student.php?name=idunning> / MIT
>> Operations Research Center <http://web.mit.edu/orc/www/>
>> www.iaindunning.com <http://www.iaindunning.com/>
>>
>
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