[Coin-discuss] Two defects of CBC

[John J Forrest]

Managed to receive attachments.  Tried with cbc/trunk.  For both problems
search was completed saying no solution found.

John Forrest


                                                                                                                                             
  From:       "Luigi Poderico" <lupoderi at tiscalinet.it>                                                                                      
                                                                                                                                             
  To:         coin-discuss at list.coin-or.org                                                                                                  
                                                                                                                                             
  Date:       01/30/2008 07:16 PM                                                                                                            
                                                                                                                                             
  Subject:    [Coin-discuss] Two defects of CBC                                                                                              
                                                                                                                                             





***********************
Warning: Your file,
test1-pulp_not_integer_solutions.zip/test1-pulp_not_integer_solutions.mps,
is larger than 20480 KB after decompression and cannot be scanned.
Warning: Your file, test1-pulp-crash.mps.zip/test1-pulp-crash.mps, is
larger than 20480 KB after decompression and cannot be scanned.
***********************


Dear Coin members,

Attached you'll find two MPS' that cause some problems at CBC.

The test1-pulp_not_integer_solutions.zip is a MIP problem, but the CBC
solution has got some integer variables at not-integer value.
The test1-pulp-crash.mps.zip makes CBC to crash after a given amount of
time.

I'm solving the two problems with "perturb off" and "log 3" option
settings.
The CBC is the stable/2.0 from
https://projects.coin-or.org/svn/Cbc/stable/2.0/, compiled with the
Visual Studio 2005 express edition on WinXP professional.

I hope that this information will help you.

Best regards,
Luigi

--
www.poderico.it

[attachment "test1-pulp_not_integer_solutions.zip" deleted by John J
Forrest/Watson/IBM] [attachment "test1-pulp-crash.mps.zip" deleted by John
J Forrest/Watson/IBM] _______________________________________________
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