[Cbc] Infeasible only with Multithreading

[Mario Souto]

Dear all,

I am using the version 2.8.12 of Cbc and having some strange problem with
the Multithreading feature. The following problem is 'proven infeasible'
when using 100 threads. However, an integer solution cab be found when only
one thread is used.

Does any one have some idea about it?

Thanks in advance,

Mario Souto.
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