[Cbc] Is it logic? and some other questions

[Christos]

And as you can see presolve takes only a few seconds and after that 
branchAndBound takes many minutes.
Why is that happening?
Since, at the end,  both give the same objective (and column solution(?)).

On 17/9/2012 18:56, Christos wrote:
> Hi all,
>
> I made this program which is consisted from  53442 columns, 12540 
> binaries, 22386 rows and 87653 elements.
>
> I get the following messages:
>
> http://imageshack.us/g/1/9763755/
>
> In your opinion are these messages logic?
>
> When i expand the model to a bigger (53442x25170 matrix and 112578 
> nonzeros), i get numerous like these and the total time exceeds 7 min 
> for a dual core processor of 2006.
> Is this normal?
>
> As you can see i use initialSolve() first and then branchAndBound(), i 
> think this is the usual method to solve a MIP/MILP problem, am i right?
>
>
>     And something irrelevant: what i have to do in order to make the 
> example program "nway.cpp" read my .mps file?
>
> Sorry if i made you tired, and thank you very much in advance.
>

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