[Cbc] Constraints order

[Yves Touchard]

Attached is a archive file (test.gz) containing an lp constraint file 
(test.lp -> /tar xzf test.gz/)

Executing cbc (#2.8.0)  on the test.lp file (/cbc test.lp/) provides the 
following result
/Result - Problem proven infeasible//
//No feasible solution found

/If the two first constraints of the LP file (lines 1258/1259) are 
swapped, the same command provides a different result:
/Result - Optimal solution found/

So, what's wrong with this constraints fle? Is there any specific order 
to declare constraints?
Or is this a bug? And, if so, is there any workaround?

Thanks in advance for any help.

Regards,

Yves


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