[Couenne] error running couenne: termination code 11

[Pietro Belotti]

Dear Francois,

I cannot replicate your problem, i.e., I cannot get a segmentation  
fault (this is what generates the "error running couenne: termination  
code 11" you are getting), and the debugger doesn't show any error  
either. Can you send me the instance you created? You can generate it  
by running the AMPL command

write gmyproblem;

which generates a file myproblem.nl that would be useful for me to  
understand better.

Anyway, that "error" occurs in some bookkeeping operations of Couenne  
and should not compromise the result. Did you try printing out or  
using the variables after that? Does AMPL give you a seemingly optimal  
solution?

Regards,
Pietro Belotti

_________________________________________
Pietro Belotti, Lehigh University
Dept. of Industrial & Systems Engineering
200 W Packer Ave, Bethlehem PA 18015.
phone: 610-758-3865   fax: 610-758-4886
email: belotti at lehigh.edu
web:   lehigh.edu/~pib208


On 02/25/2009, François Dionne <brainstorm at videotron.ca> wrote:

> Dear mailing list,
>
> I downloaded the latest stable branch of Couenne by SVN on 21 February
> 2009. I had no problems compiling on my Gutsy Gibbon Ubuntu machine.
>
> Next, I wrote my model and a script in Ampl and created some data. When
> I ran the script, it created several pages of data before crashing,
> which ended in the following:
>
> ******************************************************************************
> This program contains Ipopt, a library for large-scale nonlinear
> optimization.
>  Ipopt is released as open source code under the Common Public License
> (CPL).
>          For more information visit http://projects.coin-or.org/Ipopt
> ******************************************************************************
>
> NLP0012I
>               Num      Status      Obj             It       time
> NLP0013I     1        OPT         -1                      22
> 0.020001
> NLP0013I     2        OPT         -1                      8        0.008
> NLP0013I     3        OPT         -1                      8
> 0.008001
> Cbc0031I 2 added rows had average density of 3
> Cbc0013I At root node, 2 cuts changed objective from -1 to -1 in 2
> passes
> Cbc0014I Cut generator 0 (Couenne convexifier cuts) - 31 row cuts, 2
> column cuts (2 active)
> Clp0000I Optimal - objective value -1
> Clp0000I Optimal - objective value -1
> Cbc0010I After 0 nodes, 0 on tree, 1e+50 best solution, best possible -1
> (0.72 seconds)
> NLP0013I     4        OPT         -1                      19
> 0.012001
> NLP0013I     5        OPT         -1                      16
> 0.008001
> NLP0013I     6        OPT         -1                      23
> 0.012001
> NLP0013I     7        OPT         -1                      14
> 0.008001
> NLP0013I     8        OPT         -1                      24
> 0.020002
> NLP0013I     9        OPT         -1                      10       0.008
> Cbc0004I Integer solution of -1 found after 928 iterations and 34 nodes
> (2.19 seconds)
> Cbc0001I Search completed - best objective -1, took 928 iterations and
> 34 nodes (2.19 seconds)
> Cbc0035I Maximum depth 17, 0 variables fixed on reduced cost
>  Couenne convexifier cuts was tried 57 times and created 1926 cuts of
> which 170 were active after adding rounds of cuts
>
>  	"Finished"
> error running couenne:
> 	termination code 11
> <BREAK>
>
>
> So, what does this mean?
>
>
> _______________________________________________
> Couenne mailing list
> Couenne at list.coin-or.org
> http://list.coin-or.org/mailman/listinfo/couenne
>



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