[Couenne] Couenne Error

[scrat_zhang]

 Dear Mr. Pietro Belotti :
 The self-defined error function is compiled into a .dll file and I can call it in AMPL command window. I followed this blog http://benlockwood.com/2012/01/11/calculating-the-normal-cdf-in-ampl-with-shared-libraries/#comment-105 to do so. Will this do?
 Yours sincerely,
 Mu Zhang




At 2012-05-31 21:29:57,"Pietro Belotti" <pbelott at clemson.edu> wrote:
>Mu,
>
>unfortunately, self-defined functions cannot be used in Couenne and will 
>give that error. The reason is that Couenne decomposes the expression of 
>each function in constraints and the objective, and cannot do that for 
>user-defined functions. It would be possible to solve your problem if you 
>knew a closed-form approximation of your error function (as I think the 
>myerf means).
>
>Also, in the future please consider posting your questions to the Couenne 
>mailing list (couenne at list.coin-or.org), so that people can see answers to 
>previous questions.
>
>I hope this helps. Regards,
>Pietro
>
>
>--
>Pietro Belotti
>Dept. of Mathematical Sciences
>Clemson University
>email: pbelott at clemson.edu
>phone: 864-656-6765
>web:   http://myweb.clemson.edu/~pbelott
>
>On Thu, 31 May 2012, scrat_zhang wrote:
>
>> Dear Mr. Pietro Belotti :
>> I am recently applying Couenne on my work, and I got a error saying:
>>  
>>  ANALYSIS TEST: ERROR : unknown operator (address 0p7436c0) , aborting .
>>  exit code 4294967295
>>  (BREAK)
>>  
>> I wonder what is error may be ocurr in my .mod file cause I don't 
>> recognize the "address" code. I used a self-defined error function 
>> called "myerf" in the code, for the record, don't know if it is because 
>> of this.
>>  
>> Hope you could provide some guidance on this issue and I also wish to 
>> know how can I debug in Couenne.
>>  
>> Thanks very much for your reading this and hope to hear from you!
>>  
>> Yours sincerely ,
>> Mu Zhang
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