[Couenne] ANALYSIS TEST: ERROR: unknown operator (address 0pa24700)

[Stefan Vigerske]

Hi,

I think atan2 is not supported by Couenne. You would have to reformulate 
this one.

Stefan

On 06/20/2012 06:37 AM, Novalio Daratha wrote:
> Hi Stefan and Javed,
>
> thanks a lot for your respond. My AMPL model is attached. Would you kindly
> help me to find the source of the error?
>
> Thanking You,
>
> Novalio Daratha
>
> On Tue, Jun 19, 2012 at 9:06 PM, Stefan Vigerske
> <stefan at math.hu-berlin.de>wrote:
>
>> Hi,
>>
>> while Bonmin just uses function, gradient, and hessian values of your
>> functions as provided by AMPL, Couenne has to analyse the analytical
>> expression of your functions in order to be able to construct a convex
>> relaxation of your problems.
>> If you use operators in your functions that are not supported by Couenne
>> (yet), then you get this kind of error.
>>
>> If you post your model, it may be possible to point out which function is
>> making trouble.
>>
>> Stefan
>>
>>
>> On 06/19/2012 07:51 AM, Novalio Daratha wrote:
>>
>>> Dear All,
>>>
>>> Sorry, the same email was sent without subject.  I have an AMPL model that
>>> can be solved using bonmin. However, when I tried to used couenne, there
>>> is
>>> an error.
>>>
>>> ampl: solve;
>>> Couenne 0.4.2 --  an Open-Source solver for Mixed Integer Nonlinear
>>> Optimization
>>>
>>> Mailing list: couenne at list.coin-or.org
>>> Instructions: http://www.coin-or.org/Couenne
>>> couenne:
>>> ANALYSIS TEST: ERROR: unknown operator (address 0pa24700), aborting.
>>> exit code 4294967295
>>> <BREAK>
>>> ampl:
>>>
>>> I had google it and get no meaningful results. Would anybody help me to
>>> understand this better?
>>>
>>>
>>> Thanking You,
>>>
>>> Novalio Daratha
>>>
>>>
>>>
>>>
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>>>
>>
>