[Cbc] CBC and Gurobi give different solutions

[John Forrest]

I do not have ampl, but if someone can convert the .mod file to a .nl 
file, then I can look at it.  It might be an error in reading .nl files.

John Forrest

On 07/07/14 13:54, Tú San Pha.m wrote:
> Dear all,
>
> I submitted the same model to NEOS using Gurobi and CBC. Gurobi gave 
> me the optimal solution with objective value equals to 24 (this is the 
> optimal solution, I have checked with CPLEX), while CBC gave me the 
> one with objective value equals to 4 (for the same instance: 6*6 matrix)
>
> Attached is the model that I used. Could you please give me any idea 
> why it goes wrong?
>
> Thanks a lot
>
> San
>
>
> _______________________________________________
> Cbc mailing list
> Cbc at list.coin-or.org
> http://list.coin-or.org/mailman/listinfo/cbc

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://list.coin-or.org/pipermail/cbc/attachments/20140711/855d3ec9/attachment.html>