[Couenne] Unknown operator error

[Pietro Belotti]

Novalio,

there might be functions in your model that Couenne does not recognize. 
Couenne has to identify the expression tree of the objective function and 
all constraints in the problem, otherwise it can't solve the problem. I 
can't see which it is from the output you report, so if you are able and 
willing to send a copy of the model I'll be glad to check.

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 Fri, 24 Aug 2012, Novalio Daratha wrote:

> Dear All,
> 
> I am interested in trying couenne. Bonmin can handel my AMPL model now. When I try couenne, I got the
> following error message:
> 
> 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 0pa24830), aborting.
> exit code 4294967295
> <BREAK>
> ampl:
> 
> Would anybody kindly give me some advice on how to proceed further?
> 
> Sincerely yours,
> 
> Novalio Daratha