[Cbc] I think we found a bug in cbc: How can we report it and get fixed quickly ?

[Matthew Gidden]

If you've installed Coin in a custom location, you'll probably have to
update the include line (/usr/include/coin) and update your LIBRARY_PATH
environment variable.

On Wed, Sep 30, 2015 at 10:43 AM, ovovis <tenge at ovovis.de> wrote:

> Hi Matt,
>
> thanks a lot for your help. I tried to compile your code, but failed (I am
> not a c++ expert, I am afraid). The command line complained with:
>
> /usr/bin/ld: cannot find -lOsi
> /usr/bin/ld: cannot find -lOsiClp
> /usr/bin/ld: cannot find -lClp
> collect2: error: ld returned 1 exit status
>
> Presumably I am missing some PATH entries ?
>
> @Haroldo: Should I keep trying or will you be able to convert the MPS file
> yourself ?
>
> Thomas
>
> On Sep 30, 2015, at 5:23 PM, Matthew Gidden <gidden at wisc.edu> wrote:
>
> I recently wrote a super simple program to convert mps to lp (only using
> COIN OSI): https://gist.github.com/gidden/0d9facfbab959346e3bb
>
> Hth,
> Matt
>
>
>
> On Wed, Sep 30, 2015 at 9:49 AM, ovovis <tenge at ovovis.de> wrote:
>
>> I generated the MPS file out of AMPL. If I understand this process
>> correctly then the variables will be abbreviated and the .col and .row
>> files, that I sent you as well, are meant to translate the mps variables
>> into the original names. Then you should have already all information
>> necessary to reproduce the original names.
>>
>> But maybe I misunderstood your question.
>>
>> Please let me know.
>>
>> Thomas
>>
>> On Sep 30, 2015, at 4:12 PM, Haroldo Gambini Santos <
>> haroldo.santos at gmail.com> wrote:
>>
>> Hi Thomas,
>>
>> I converted your MPS to LP to take a look (don't have AMPL here).
>> Strangely no "bounds" section is generated.
>>
>> The MPS conversion also lost the original names, can yon generate
>> including the original names so that the specific result for variable ym is
>> visible ?
>>
>> Cheers
>>
>> On 30-09-2015 10:17, ovovis wrote:
>>
>> Hi Haraldo,
>>
>> have you had a chance to look at the lp yet ?
>>
>> Would be great to hear from you. Let me know if I can be of any further
>> help.
>>
>> Thomas
>>
>> On Sep 28, 2015, at 3:44 PM, Haroldo Gambini Santos <
>> haroldo.santos at gmail.com> wrote:
>>
>> Hi Thomas,
>>
>> Can you send the LP where the problem occurs ?
>>
>> Cheers
>>
>> On 28-09-2015 01:37, ovovis wrote:
>>
>> Dear cbc team,
>>
>> my name is Thomas Enge from Berlin Germany. We are a small (2 persons)
>> start up company (see also www.ovovis.de and then About us). We use AMPL
>> + cbc internally to provide a portfolio optimization service to energy
>> traders. So far we only ran tests with our potential customers when we
>> detected that cbc violates the domain definition of variables in the
>> solution for specific problem settings. Our variables are defined as >= 0,
>> but the result also produces negative numbers for these variables. This is
>> the case for version 2.9.4 - 2.9.6.
>>
>> My question is how can we address this issue best to you ? And is there a
>> way to receive a quick fix or do we need to wait for the next stable
>> release ? The latter is very important for us to understand since it
>> effects our go-live date.
>>
>> Thanks in advance for your help
>>
>> Thomas Enge
>>
>>
>> OvvvvvvvvvvvvvvvvvvvOvis
>>
>> ovovis GmbH
>> Dr. Thomas Enge
>> Stargarder Str. 57
>> D-10437 Berlin
>>
>> M: +49 1515 910 5118
>> F: +49 30 538 10 188
>> E: tenge at ovovis.de
>> W: www.ovovis.de
>> --------------------------------------
>> Amtsgericht Charlottenburg
>> HRB 116742B
>> Vat-ID: DE262642185
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>> _______________________________________________
>> Cbc mailing listCbc at list.coin-or.orghttp://list.coin-or.org/mailman/listinfo/cbc
>>
>>
>> --
>> ==================================================
>> Haroldo Gambini Santos
>> D.Sc, Computer Science
>> Universidade Federal de Ouro Pretohttp://www.decom.ufop.br/haroldo/
>>
>>
>>
>> --
>> ==================================================
>> Haroldo Gambini Santos
>> D.Sc, Computer Science
>> Universidade Federal de Ouro Pretohttp://www.decom.ufop.br/haroldo/
>>
>>
>>
>> _______________________________________________
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>> Cbc at list.coin-or.org
>> http://list.coin-or.org/mailman/listinfo/cbc
>>
>>
>
>
> --
> Matthew Gidden, Ph.D.
> Postdoctoral Associate, Nuclear Engineering
> The University of Wisconsin -- Madison
> Ph. 225.892.3192
>
>
>


-- 
Matthew Gidden, Ph.D.
Postdoctoral Associate, Nuclear Engineering
The University of Wisconsin -- Madison
Ph. 225.892.3192
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