[Ipopt-tickets] [Ipopt] #308: Dual infeasibility calculated by the CUTEst functions does not coincide with that reported by Ipopt

[Ipopt]

#308: Dual infeasibility calculated by the CUTEst functions does not coincide
with that reported by Ipopt
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  Reporter:  secchinleo     |      Owner:  ipopt-team
      Type:  clarification  |     Status:  new
  Priority:  normal         |  Component:  Ipopt
   Version:  3.12           |   Severity:  normal
Resolution:                 |   Keywords:
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Comment (by secchinleo):

 I have identified that the multipliers returned by the main function of
 Ipopt associated with the bound constraints of fixed variables treated as
 parameters are wrong. They are set to zero, but should be defined using
 -grad L.

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Ticket URL: <https://projects.coin-or.org/Ipopt/ticket/308#comment:1>
Ipopt <http://projects.coin-or.org/Ipopt>
Interior-point optimizer for nonlinear programs.