[Cmpl] CMPL or CBC problem/bug

[Mike Steglich]

Hi Bastian,

I can reproduce the problem you mentioned. It appears under several linux systems. If the parameter -threads is assigned a wrong value (e.g. greater than the available cores) then crashes the OSSolverService binary and Cmpl can't read the solution. I posted it to the Cbc and OS mailing list hoping that the guys will fix this problem soon. 

Cheers,

Mike
Am 12.06.2013 um 16:32 schrieb Bastian Dörig:

> Hi Mike,
> 
> the files are attached, with the output of CMPL/CBC in Logfile.txt.
> I've tried it several times and once or twice CBC was able to solve this, and the other times the same error occurs.
> 
> Regrads,
> Bastian
> 
> 
> Am 11.06.2013 16:29, schrieb Mike Steglich:
>> Hi Bastian,
>> 
>> Could you send me your Cmpl model or  the OSiL file.
>> 
>> You can't see the OSiL file usually but you can catch it by using the command line argument -dontRemoveTmpFiles.
>> 
>> Thanks,
>> 
>> Mike
>> 
>> 
>> Am 11.06.2013 um 15:33 schrieb Bastian Dörig <Bastian_D at hotmail.de>:
>> 
>>> Hi Mike,
>>> 
>>> i've got a question/bug report concerning CMPL, which uses CBC to solve an ILP (I'd guess the problem is CBC and not CMPL, so it would be nice if you could forward this e-mail).
>>> The model was generated and the status is finished and CBC is called automatically.
>>> After the continuous object is solved CBC says:
>>> "Cbc0038I Full Problem 130765 rows 65411 columns, reduced to 130763 rows 65384 colums - too large.
>>> Cbc0038I Full Problem 130765 rows 65411 columns, reduced to 130763 rows 65384 colums - too large.
>>> Cbc0038I Full Problem 130765 rows 65411 columns, reduced to 65164 rows 65163 colums - too large.
>>> Error (interfaces): Can not read the solution Energiecontainer_ohne-Abfrage"
>>> and the program quits immediately.
>>> If I run CMPL with CBC without that many rows and columns, there is no problem.
>>> Is there an upper bound of constraints and can I increase it manually?
>>> 
>>> Regrads,
>>> Bastian Dörig
>> 
> 
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