[Scip] SCIP interface with AMPL
Cristiano Arbex
crisarbex at gmail.com
Mon Sep 30 18:49:43 CEST 2013
Thanks and sorry for the annoyance.
I found out why I was not asked for the links. I was compiling the whole
scipoptsuite, containing everything. Then the warning message saying I
should enter the ipopt folder appeared but I was never prompted to enter
it, it just went through until the mistake happened.
Then I started from scratch and recompiled each package separately: zimpl,
soplex and then scip. When compiling scip I was prompted to enter the
folder for all three: zimpl, soplex and ipopt, and it successfully compiled.
Then I tried to solve my instance and IPOPT complained that Lapack was not
included. I recompiled IPOPT by including Lapack (going to
ThirdParty/Lapack and running script get.Lapack on IPOPT). Then I
recompiled scip again. Now when I try to solve my instance I get:
---------------------
Presolving Time: 4.21
time | node | left |LP iter|LP it/n| mem |mdpt |frac |vars |cons |cols
|rows |cuts |confs|strbr| dualbound | primalbound | gap
6.5s| 1 | 0 | 1111 | - | 21M| 0 | 6 |4268 |3217 |4268
|3196 | 0 | 15 | 0 | 0.000000e+00 | -- | Inf
Exception of type: OPTION_INVALID in file
"../../../../Ipopt/src/Algorithm/IpAlgBuilder.cpp" at line 321:
[src/nlpi/nlpi_ipopt.cpp:1091] ERROR: Ipopt returned with application
return status -12
---------------------
Thank you for all your help and please if anyone has any ideas how to
handle this I would be very grateful.
Best regards,
Cristiano
On Mon, Sep 30, 2013 at 4:52 PM, Stefan Vigerske
<stefan at math.hu-berlin.de>wrote:
> Hi,
>
> the SCIP makesystem should ask you for the link. Try running
>
> make IPOPT=true links
>
> or just go into the scip/lib directory and do
>
> ln -s <ipoptbuilddir> ipopt.linux.x86_64.gnu.opt
>
> Stefan
>
>
> On 09/30/2013 05:40 PM, Cristiano Arbex wrote:
>
>> Hi, thanls Ambros and Hans for the reply.
>>
>> I installed and compiled IPOPT. I am not being able to install SCIP with
>> IPOPT, I tried to reinstall scip like you said:
>>
>> make IPOPT=true
>>
>> But I don't know where do I provide the link to IPOPT libraries. I get the
>> error:
>>
>> src/nlpi/nlpi_ipopt.cpp:45:25: fatal error: IpoptConfig.h: No such file or
>> directory
>> compilation terminated.
>> make[2]: *** [obj/O.linux.x86_64.gnu.opt/**lib/nlpi/nlpi_ipopt.o] Error 1
>>
>> Do you know how to proceed?
>>
>> Thank you very much and sorry if this is stupid,
>> Cristiano
>>
>>
>>
>> On Mon, Sep 30, 2013 at 4:01 PM, Ambros Gleixner <gleixner at zib.de> wrote:
>>
>> Hi Cristiano,
>>>
>>> exactly, your installation seems to miss Ipopt. You have to use "make
>>> IPOPT=true" when compiling SCIP and provide the link to the build
>>> directory
>>> of your Ipopt installation.
>>>
>>> Best regards,
>>>
>>> Ambros
>>>
>>>
>>>
>>> Am 30.09.2013 16:55, schrieb Cristiano Arbex:
>>>
>>> Hi again,
>>>>
>>>> I've been using the NEOS server to test SCIP and I've been impressed
>>>> with its speed. I tried solving 36 nonlinear instances and the largest
>>>> one can be downloaded here:
>>>>
>>>> https://docs.google.com/file/****d/****0B4Rt5z2PACNndUZUc184dVBxQVU/***
>>>> * <https://docs.google.com/file/**d/**0B4Rt5z2PACNndUZUc184dVBxQVU/**>
>>>> edit?usp=sharing<https://docs.**google.com/file/d/**
>>>> 0B4Rt5z2PACNndUZUc184dVBxQVU/**edit?usp=sharing<https://docs.google.com/file/d/0B4Rt5z2PACNndUZUc184dVBxQVU/edit?usp=sharing>
>>>> >
>>>>
>>>>
>>>> It takes NEOS SCIP 6 seconds to solve it. I am using the same scip.set
>>>> parameters file that can be found on NEOS. I installed the SCIP
>>>> optimization suite following the steps in the link provided in the first
>>>> message of this thread.
>>>>
>>>> I know my PC is slower than the NEOS server but SCIP on my PC has been
>>>> solving the same instance for 1200s. In the output file I get this
>>>> message:
>>>>
>>>> --------------
>>>> Presolving Time: 4.20
>>>> Quadratic constraint handler does not have LAPACK for eigenvalue
>>>> computation. Will assume that matrices (with size > 2x2) are indefinite.
>>>>
>>>> time | node | left |LP iter|LP it/n| mem |mdpt |frac |vars |cons
>>>> |cols |rows |cuts |confs|strbr| dualbound | primalbound | gap
>>>> 6.5s| 1 | 0 | 1111 | - | 21M| 0 | 6 |4268 |3217
>>>> |4268 |3196 | 0 | 15 | 0 | 0.000000e+00 | -- | Inf
>>>> 6.7s| 1 | 0 | 1563 | - | 21M| 0 | 6 |4268 |3217
>>>> |4268 |3196 | 0 | 15 | 0 | 0.000000e+00 | -- | Inf
>>>> 6.8s| 1 | 0 | 1575 | - | 21M| 0 | 6 |4268 |3217
>>>> |4268 |3207 | 11 | 15 | 0 | 0.000000e+00 | -- | Inf
>>>> --------------
>>>>
>>>> While NEOS output file looks like this:
>>>>
>>>> --------------
>>>>
>>>> Presolving Time: 2.54
>>>>
>>>> time | node | left |LP iter|LP it/n| mem |mdpt |frac |vars |cons
>>>> |cols |rows |cuts |confs|strbr| dualbound | primalbound | gap
>>>> 3.8s| 1 | 0 | 1060 | - | 21M| 0 | 6 |4268 |3217
>>>> |4268 |3196 | 0 | 15 | 0 | 0.000000e+00 | -- | Inf
>>>>
>>>> ********************************************************************
>>>> ******************
>>>> This program contains Ipopt, a library for large-scale nonlinear
>>>> optimization.
>>>> Ipopt is released as open source code under the Eclipse Public
>>>> License
>>>> (EPL).
>>>> For more information visithttp://projects.coin-or.***
>>>> *org/Ipopt<http://projects.**coin-or.org/Ipopt<http://projects.coin-or.org/Ipopt>
>>>> >
>>>>
>>>> ********************************************************************
>>>>
>>>> ******************
>>>>
>>>> q 6.2s| 1 | 0 | 1138 | - | 21M| 0 | - |4268 |3217
>>>> |4268
>>>> |3196 | 0 | 15 | 0 | 0.000000e+00 | 0.000000e+00 | 0.00%
>>>> 6.2s| 1 | 0 | 1138 | - | 21M| 0 | - |4268 |3217
>>>> |4268 |3196 | 0 | 15 | 0 | 0.000000e+00 | 0.000000e+00 | 0.00%
>>>>
>>>> --------------
>>>>
>>>> Do you know why I cannot reproduce such results? Might I be missing
>>>> something, like the IPOPT nonlinear solver?
>>>>
>>>> Thank you very much,
>>>> Cristiano
>>>>
>>>>
>>>>
>>>>
>>>> On Sat, Sep 28, 2013 at 4:30 PM, Cristiano Arbex <crisarbex at gmail.com
>>>> <mailto:crisarbex at gmail.com>> wrote:
>>>>
>>>> Thank you very much, Stefan, that was very helpful.
>>>>
>>>>
>>>> On Sat, Sep 28, 2013 at 2:06 PM, Stefan Vigerske
>>>> <stefan at math.hu-berlin.de <mailto:stefan at math.hu-berlin.****de<
>>>> stefan at math.hu-berlin.de>**>>
>>>>
>>>> wrote:
>>>>
>>>> Hi,
>>>>
>>>> what is not supported so far is to set SCIP options via the
>>>> AMPL
>>>> script language.
>>>> However, AMPL/SCIP reads by default SCIP options from the file
>>>> scip.set, if present.
>>>>
>>>> Alternatively, one can specify a SCIP settings file as argument
>>>> to the AMPL/SCIP binary. However, that would require to write
>>>> out the AMPL model as .nl file first and to run the binary
>>>> explicitly, e.g.,
>>>> ./bin/scipampl foo.nl <http://foo.nl> myoptions.set
>>>>
>>>>
>>>> Btw, adding "-i" to the command line arguments gives you the
>>>> SCIP interactive shell.
>>>>
>>>> Hope that helps,
>>>> Stefan
>>>>
>>>>
>>>>
>>>> On 09/28/2013 01:55 PM, Cristiano Arbex wrote:
>>>>
>>>> I am trying to use SCIP with its interface to AMPL, which I
>>>> installed on
>>>> Linux via this following tutorial:
>>>>
>>>> http://zverovich.net/2012/08/_**
>>>> **_07/using-scip-with-ampl.**html<http://zverovich.net/2012/08/_**_07/using-scip-with-ampl.html>
>>>> <http://zverovich.net/**2012/08/__07/using-scip-with-**ampl.html<http://zverovich.net/2012/08/__07/using-scip-with-ampl.html>
>>>> >
>>>>
>>>> <http://zverovich.net/2012/08/**
>>>> **07/using-scip-with-ampl.html<http://zverovich.net/2012/08/**07/using-scip-with-ampl.html>
>>>> **<http://zverovich.net/2012/08/**07/using-scip-with-ampl.html<http://zverovich.net/2012/08/07/using-scip-with-ampl.html>
>>>> >
>>>>
>>>>
>>>>>
>>>>
>>>> In the tutorial it is said that no SCIP options are
>>>> currently supported. Do
>>>> you know if there is a way to use options with AMPL or if
>>>> there is an
>>>> alternate way to do this, for example, by presenting an
>>>> options file?
>>>>
>>>> Thank you very much,
>>>> Cristiano
>>>>
>>>>
>>>>
>>>> ______________________________****___________________
>>>>
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>>>> >
>>>>
>>>>>
>>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>> ______________________________****_________________
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>>>> >
>>>>
>>>>
>>>> --
>>> ______________________________****____________________________**__
>>>
>>> Ambros M. Gleixner
>>> Zuse Institute Berlin - Matheon - Berlin Mathematical School
>>> http://www.zib.de/gleixner
>>>
>>> ______________________________****_________________
>>> Scip mailing list
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>>> >
>>>
>>>
>>
>>
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>
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