[Ipopt] C++ interface and .nl files

[Gianpaolo Gulletta]

Hi,

thank you all for your kind replies.

I thought that it was not possible in a direct way and I know that Mr. 
Gay maintains the ASL library.
Anyway, I think I would go for the "modern C++ NL reader".

Thank you very much.

On 27-01-2016 18:08, Ian Washington wrote:
> My mistake. Good to know.
>
> Ian.
>
>
> On 01/27/2016 01:06 PM, Anthony D. Kelman wrote:
>> Ipopt has a command line driver that uses ASL to load .nl files, adapting
>> that same code into a C++ library wouldn't be hard.
>>
>> Or you can look at https://github.com/ampl/mp which also contains a more
>> modern C++ NL reader (the classic ASL is in C).
>> On Jan 27, 2016 10:02 AM, "Horand Gassmann" <Horand.Gassmann at dal.ca> wrote:
>>
>>> This is actually not true. David Gay made available and maintains the AMPL
>>> Solver Library ASL, which can be downloaded from COIN-OR. The OS project
>>> has an interface to Ipopt that uses ASL and provides support for .nl files,
>>> even if Ipopt does not do so directly.
>>>
>>> -------------------------------------------------------
>>>
>>> Horand I. Gassmann, Professor
>>>
>>> Kenneth C. Rowe School of Business, Dalhousie University
>>> 6100 University Avenue, PO Box 15000
>>> Halifax, Nova Scotia, Canada, B3H 4R2
>>> ph. (902) 494-1844
>>> fax (902) 494-1107
>>>
>>> http://myweb.dal.ca/gassmann/
>>> ________________________________________
>>> From: Ipopt [ipopt-bounces at coin-or.org] on behalf of Ian Washington [
>>> washinid at mcmaster.ca]
>>> Sent: January-27-16 1:58 PM
>>> To: ipopt at list.coin-or.org
>>> Subject: Re: [Ipopt] C++ interface and .nl files
>>>
>>> Short answer is NO.
>>>
>>> You should look into modeling tools like Pyomo or Casadi. You can find
>>> examples in each respective package.
>>>
>>> Ian.
>>>
>>>
>>> On 01/27/2016 09:54 AM, Gianpaolo Gulletta wrote:
>>>> Hi ,
>>>>
>>>> I have Ipopt 3.12.4 and I would like to know if there is the possibility
>>>> to read a .nl file through c++ code and solve the problem.
>>>> As far as I know there are not examples about it, therefore I would
>>>> really appreciate a example code to understand how it works.
>>>>
>>>> Thank you very much.
>>>>
>>>> Best Regards,
>>>>
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-- 
Gianpaolo Gulletta