[Cbc] CbcStrategyDefault problem

[John J Forrest]

trunk seems OK and hopefuly this will go to stable very soon.  I don't
really want to spend time digging into it.

John Forrest


                                                                           
             "Rolf Steenge"                                                
             <rolf.steenge at pla                                             
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                                                                   Subject 
                                       [Cbc] CbcStrategyDefault problem    
             06/20/07 12:19 PM                                             
                                                                           
                                                                           
                                                                           
                                                                           
                                                                           




Hi,

I have a problem with CbcDefaultStrategy.
I noticed it earlier with larger problems but it now also occurs with the
small enclosed problem

Program:

                   OsiClpSolverInterface solver;
                   solver.readMps("problem.mps");
                   CbcModel model(solver);.

                   model.initialSolve(););.

                   //CbcStrategyDefault strategy;
                   //model.setStrategy(strategy);

                   model.branchAndBound();

The integer solution 19.0373 is found (lp = 18.9836)
If however the strategy lines are uncommented it cannot find a solution.

Cbc version 1.1.0 was used with MS VC++ version 6 (same behavior also with
version 8).

Please help

Best regards
Rolf Steenge
 (See attached file: problem.zip)
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