[Cbc] Constraint Violation in CBC

[John Forrest]

Xin, (Thomas),

Coin lp reader wants an "End"

With that I could not reproduce error with stable 2.9.  Solution attached

John Forrest
On 09/07/15 10:46, Thomas Vincent wrote:
> Hello Xin,
>
> Just tried your instance (the name of the last variable at the end of
> the file is incomplete, btw, it should be n_5301_Bruges_Toulouse).
>
> Cbc crashed when trying to load the file in command line.
> However, GLPK was able to solve it and returned a solution with an
> objective value of 2.592971494e+05.
>
> So I would say that your model looks ok and maybe something is going
> wrong with CBC.
>
> Cheers,
> Thomas
>
> Le 08/07/2015 15:01, Xin TANG a écrit :
>> Hi,
>>
>>       I am running CBC by using ORtools to solve a MIP model of a
>> location problem.
>> The model is exported in LP format attached in this mail.
>>      CBC gives a feasible solution and all values of decision variables
>> and  objective function are 0. But this
>> solution violate many constraints. And I checked by running Cplex the same
>> model (if I code correctly), and the optimal solution value are not 0.
>>      Could you tell me if the constraint format is OK or what is reason
>> of this problem.
>>
>> Thanks and regards,
>>
>> Xin
>>
>>
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>
>
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