[Couenne-tickets] [Couenne] #33: Counne says "tightened NLP is infeasible"

[Couenne]

#33: Counne says "tightened NLP is infeasible"
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  Reporter:  thofrei  |      Owner:  pbelotti
      Type:  defect   |     Status:  new
  Priority:  major    |  Milestone:
 Component:  Couenne  |    Version:
Resolution:           |   Keywords:  infeasible Couenne tightened NLP
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Comment (by pbelotti):

 Hi,

 I assume your second version has those parameters fixed to a given value.
 The output you get seems to suggest that the bound reduction procedure
 indeed finds (incorrectly) that the problem is infeasible. If the problem
 is not too large, you may try using an option file couenne.opt (which has
 to reside in the same directory from which you run Couenne) that contains
 one or more of the following lines:

 {{{
 feasibility_bt  no
 redcost_bt      no
 aggressive_fbbt no
 optimality_bt   no
 }}}

 However, in order to solve the issue, it might be useful if you attach the
 problem.

 Regards,[[BR]]
 Pietro

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Ticket URL: <https://projects.coin-or.org/Couenne/ticket/33#comment:1>
Couenne <https://projects.coin-or.org/Couenne>
Couenne, a solver for non-convex MINLP