Re: [eclipse-clp-users] 'Problem is infeasible!' in eplex goes to stdout

From: Sergii Dymchenko <kit1980_at_...6...>
Date: Thu, 11 Sep 2014 15:08:48 -0700
Hi Kish,

Thanks for letting me know. I hope the migration will come out well.

I understand that CBC/CLP solvers are third-party solvers and Eplex can
also interface to other MP solvers.
But in reality if a person new to ECLiPSe wants to try some examples he
will just download ECLiPSe binaries and it's very unlikely that he will buy
other solvers (I believe free GLPK is very slow for integer programming
even compared with CBC), install, configure them, etc.

Sergii.



On Thu, Sep 11, 2014 at 2:55 PM, Kish Shen <kisshen@...5...> wrote:

> On 11/09/2014 06:07, Sergii Dymchenko wrote:
>
>> Hi,
>>
>> Do you have any estimate when you will be able to update the
>> Cbc we use by compiling it with the macro to suppress the printing of
>> these messages?
>>
>> I'd want to publish an article that have some examples using eplex, and
>> I'd
>> like the examples to work with the latest stable ECLiPSe version if
>> someone
>> wants to test.
>>
>> Sergii.
>>
>
> Hi Sergii,
>
> Unfortunately we had a sudden and unexpected change to the machines we
> build ECLiPSe on, and we are in the process of migrating to new machines,
> but there are some difficulties, and it is unlikely we will be able to
> produce new distributions in the next few days.
>
> John Forrest (the main implementer of the CBC and CLP solvers) have kindly
> updated CBC with the changes so that those messages are no longer sent
> directly to stdout. I had wanted to update the CBC in our binary ECLiPSe
> distributions, but this will need to wait till we restart our daily builds.
>
> The CBC/CLP solvers are third-party solvers and not part of ECLiPSe; these
> solvers are distributed with our binary distributions for convenience and
> because their license allow us to do so. Eplex can also interface to other
> MP solvers, and your examples should run regardless of the actual MP solver
> used.
>
> Cheers,
>
> Kish
>
>
>
>
Received on Thu Sep 11 2014 - 22:08:56 CEST

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