[Coin-discuss] OsiXprSolverInterface stdout control

[Stefan Vigerske]

Hi,

the output of Xpress is redirected by OsiXpr through the registered 
CoinMessageHandler. The default handler just writes to stdout.
You can register your own message handler via 
OsiXprSolverInterface::passInMessageHandler().
If you just want to disable output, then 
osixpr->messageHandler()->setLogLevel(0) should do it.
I think there is no finegrained control of verbosity levels implemented 
in the OsiXpr interface so far.

Stefan

> Hi all,
>
> I'am using OsiXprSolverInterface and, at the "loadProblem" and
> "initialSolve" methods, Xpress prints the problem statistics and solution
> summary at the stdout, as follows:
>
>> XPRS0000
>> XPRS0000  Reading Problem Prob1
>> XPRS0000  Problem Statistics
>> XPRS0000             2 (     50 spare) rows
>> XPRS0000             7 (      0 spare) structural columns
>> XPRS0000             8 (    100 spare) non-zero elements
>> XPRS0000  Global Statistics
>> XPRS0000             0 entities        0 sets        0 set members
>> XPRS0000  Minimizing LP Prob1
>> XPRS0000  Original problem has:
>> XPRS0000           2 rows            7 cols            8 elements
>> XPRS0000  Presolved problem has:
>> XPRS0000           1 rows            3 cols            3 elements
>> XPRS0000
>> XPRS0000     Its         Obj Value      S   Ninf  Nneg        Sum Inf  Time
>> XPRS0000       0           .000000      D      1     0    2976.000000     0
>> XPRS0000       1       23808.00000      D      0     0        .000000     0
>> XPRS0000  Uncrunching matrix
>> XPRS0000       1       23808.00000      D      0     0        .000000     0
>> XPRS0000  Optimal solution found
>
>
> Is there any way to change the verbose level or redirect the Xpress output
> to somewhere else? I tried to use setLogFile, but it didn't work.
>
> Thanks in advance,
> Luiz
>
>
>
>
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