[Coin-discuss] OsiClp proper use of initialSolve and resolve, setObjective

Fri May 23 04:11:19 EDT 2008

Sebastian,

Will fix - may take me until Monday to look at it.

Will fixes in stable/2.1 and trunk be enough?

John

  From:       Sebastian Nowozin <nowozin at gmail.com>                                                                          

  To:         coin-discuss at list.coin-or.org                                                                                  

  Date:       05/23/2008 03:24 AM                                                                                            

  Subject:    Re: [Coin-discuss] OsiClp proper use of initialSolve and resolve, setObjective                                 

Hello,

just as an update, I filed three issues (#54, #55 and #56) to the
COIN-OR Osi trac bugtracker,

    OsiClp returns wrong objective for empty constraint matrix
    https://projects.coin-or.org/Osi/ticket/54

    OsiClp crashes on enableFactorization with empty constraint system
    https://projects.coin-or.org/Osi/ticket/55

    OsiClp solves problem but getColSolution() returns NULL
    https://projects.coin-or.org/Osi/ticket/56

Thanks,
Sebastian

Lou Hafer wrote:

>            At a glance, for any Osi I would expect this to work. In
particular, if
> resolve() and isProvenOptimal() succeed, then there should be a valid
column
> solution returned by getColSolution().

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