[Clp] OsiClpSolverInterface::computeLargestAway sets LogLevel

[Sebastian Niemann]

Hi!

I think we are facing the same problem. From some point on our virtual 
user print method is not called anymore. Debugging showed that this is 
due to the call "temp.setLogLevel(0)" in 
"OsiClpSolverInterface::computeLargestAway()".

Although temp itself is a copy, the CoinMessageHandler member handler_ 
is *not* copied in case a custom handler is used (see beginning of 
method "ClpModel::gutsOfCopy"). The log level of "temp" (which - due to 
the shallow copy - is the log level of our custom handler) is never 
reset which then leads to silence...

Cheers,
Sebastian

On 07.10.2011 18:23, John Forrest wrote:
> I don't really understand what problem is.
>
> temp is a separate copy which will be deleted on exit - logLevel in
> modelPtr will not be changed (or have I misunderstood).
>
> John Forrest
>
> On Thu, 2011-10-06 at 13:59 +0300, Jan-Willem Goossens wrote:
>> It seems to me that the computeLargestAway() method in
>> OsiClpSolverInterface sets the LogLevel to a 'temporary' value, but
>> doesnt set it back:
>>
>> OsiClpSolverInterface::computeLargestAway()
>> {
>>    // get largest scaled away from bound
>>    ClpSimplex temp=*modelPtr_;
>>    temp.setLogLevel(0);
>>
>>
>> I guess the original value should be saved, and then re-set?
>> Regards,
>>
>> Jan-Willem
>> _______________________________________________
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>>
>
>
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