[Cbc] wrong objective sign in solution

John Forrest john.forrest at fastercoin.com
Mon Sep 29 07:18:59 EDT 2014


Victor,

Over-enthusiastic sign change for maximization - should be fixed now.

John Forrest
On 28/09/14 23:46, victor.zverovich at gmail.com wrote:
> Hello,
>
> CBC reports wrong objective sign for the attached problem:
>
> $ cbc test -AMPL
> $ head -1 test.sol
> CBC 2.8.12 optimal, objective -192000
>
> The correct objective value is 192000. The problem was obtained from 
> the AMPL model prod0.mod 
> <http://ampl.com/BOOK/EXAMPLES/EXAMPLES2/prod0.mod>.
>
> Here's the original bug report in the AMPL Google Group: 
> https://groups.google.com/d/msg/ampl/cfkafsdmGMg/Jd5tmc9GPbsJ
>
> Best regards,
> Victor
>
>
>
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