[Symphony] Symphony and AMPL in a Dockerfile

[Ted Ralphs]

Sorry for the long-winded reply when there is a simple fix that I
overlooked. You need to option "--with-gmpl" to the configure command.
Sorry that the documentation doesn't mention this. I will add it. I also
submitted a pull request on Github to fix this.

Cheers,

Ted

On Wed, Dec 23, 2015 at 5:48 PM, Ted Ralphs <tkr2 at lehigh.edu> wrote:

> Hi Patrick,
>
> First, thanks for taking the time to make the Docker image. I've meant to
> make the effort to learn a bit about Docker and this gives me a way to dive
> in. As a side comment, the documentation you are referring to is for a
> different version than you're using, though this is not the reason you're
> having trouble.
>
> Looking at the commands in your docker file, they are exactly correct as
> far as I can see. I can try to replicate everything here locally, but on
> the face of it, I really don't see why you're getting the error. If it
> would be easy to send me the config.log file from the SYMPHONY subdirectory
> and perhaps even the output from the script off-line, I could probably spot
> the trouble. Perhaps the get.Glpk script is failing but not returning an
> error code so that the build still goes through? I have had trouble running
> that script on some platforms due to github certificate issues. I will try
> to replicate your steps and see what I can find out.
>
> As an aside, depending on what you're really trying to do, I may be able
> to recommend better options for using SYMPHONY (and/or other open source
> solvers) with AMPL. Reading the AMPL model directly with SYMPHONY has some
> shortcomings when it comes to getting solutions back out and doing
> post-solution analysis. There are a number of other options, such as
> building the AMPL client included in the Optimization Services project (
> projects.coin-or.org/OS), which wraps SYMPHONY and a number of other
> solvers and can be called from AMPL in the standard way.
>
> Building OS is exactly like building SYMPHONY. To build the AMPL client,
> you would need to run the get.ASL script instead of the get.Glpk script,
> however. If you want to pursue that option, OS has extensive documentation
> and examples or I can point you to some places that specifically describe
> how to use the AMPL client.
>
> Cheers,
>
> Ted
>
> On Tue, Dec 22, 2015 at 6:37 PM, Patrick Wieschollek <
> patrick at wieschollek.info> wrote:
>
>> Hi,
>>
>> I hope this is the correct way to get in contact.
>>
>> The documentation does not cover how to use symphony to solve models from
>> AMPL, although there are some flags to call symphony with a AMPL model file.
>>
>> To make the problem reproducible I created a docker-image:
>> https://github.com/PatWie/symphony-docker
>>
>> which contains all steps from
>> http://www.coin-or.org/SYMPHONY/man-5.1/node19.html
>>
>> (See
>> https://github.com/PatWie/symphony-docker/blob/master/image/Dockerfile)
>>
>> However, I have the issue when calling
>> "/var/symphony/bin/symphony -F /var/symphony/SYMPHONY/Datasets/sample.mod
>> -D /var/symphony/SYMPHONY/Datasets/sample.dat"
>>
>> to get
>> "
>> Reading input file...
>>
>> ERROR: SYMPHONY can only read GMPL/AMPL files if GLPK is
>> installed and the USE_GLPMPL compiler define is set.
>> Exiting.
>>
>> "
>>
>> What are the missing steps?
>>
>> _______________________________________________
>> Symphony mailing list
>> Symphony at list.coin-or.org
>> http://list.coin-or.org/mailman/listinfo/symphony
>>
>>
>
>
> --
> Dr. Ted Ralphs
> Professor, Lehigh University
> (610) 628-1280
> ted 'at' lehigh 'dot' edu
> coral.ie.lehigh.edu/~ted
>



-- 
Dr. Ted Ralphs
Professor, Lehigh University
(610) 628-1280
ted 'at' lehigh 'dot' edu
coral.ie.lehigh.edu/~ted
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://list.coin-or.org/pipermail/symphony/attachments/20151223/27bc179a/attachment.html>