[Clp] CLP with warmstart running too long

[John Forrest]

Robert,

Obviously something is wrong.  If you are getting output then cycling, 
if no output then some data may have got corrupted and in a infinite 
"while" loop or similar.

Difficult for me to debug as unlikely to be able to get exact compiler 
results.  I might be able to if your system Linux.

If you can attach a debugger then you could see where it is and maybe 
set handler_->logLevel_=63 to get more output.

John Forrest

On 26/05/14 22:10, Lacroix, Robert wrote:
>
> I am running around 5,000 instances of an LP problem of size 66112 
> rows by 104643 columns programmed through the OSI interface with 
> approximately normal distribution of CPU time peaking around 3 
> minutes,  with about 1000 cases taking between 10 and 36 minutes. They 
> all finished except one, which is still running after 67 hours. These 
> runs are all provided a warmstart that conditions the solution. 
> Without a warmstart, this exceptional case completes in under 4 
> minutes. Is it possible that CLP is cycling and will never find a 
> solution?
>
>
> Robert Lacroix
>
> Manitoba Hydro
>
>
>
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> Clp at list.coin-or.org
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