[Couenne] Any program (other than AMPL) to write NL files?

[sguazt]

On Tue, Sep 27, 2011 at 11:37 PM, Mustafa Kilinc <kilinc at wisc.edu> wrote:
> Hello Marco,
> I used COCONUT converters for converting MINLP problems. To convert a "mod"
> file, first you need to convert it to "dag" file. Then you can convert it to
> an "nl" file.
> http://www.mat.univie.ac.at/users/coconut/public_html/coconut-environment/
> Here is the direct link of converters.
> http://www.mat.univie.ac.at/coconut-environment/coconut-converters-bin.FC10.tgz
>

Hi Mustafa,

Thank you for replying.

I've just tried COCONOUT converters but I run into troubles.
If I understand, the first step is to perform the AMPL->DAG
conversion. In order to do so, I run the 'ampl2dag' converter.
However this script fails in running AMPL (at line 39) since it
violates the student version limit:

Sorry, the student edition of AMPL is limited to 300 variables and 300
constraints and objectives (after presolve) for nonlinear problems.
You have 350 variables, 0 constraints, and 1 objective.

Error using ampl to convert tre.mod to non-linear format

Where I am wrong?

Thank you very much!

Best,

-- Marco
> Cheers,
> Mustafa
>
> On 09/27/2011 05:14 PM, sguazt wrote:
>>
>> Hi,
>>
>> I know this is an already asked question (the last one I found is
>> http://list.coin-or.org/pipermail/couenne/2011-March/000175.html).
>> But maybe something new has been released meanwhile.
>>
>> So, does anyone know a free program for linux for writing NL files?
>>
>> I've used to use the AMPL student version, but now I have to solve
>> some problem which is bigger than the student-version limit.
>>
>> Thank you very much for any help.
>>
>> Best,
>>
>> -- Marco
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>
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