[Ipopt] run time constraint violation

[Ming Ji]

--> Starting line search in iteration 2 <--
Mu has changed in line search - resetting watchdog counters.
Acceptable Check:
  overall_error =  3.3081951656527707e+01   acceptable_tol_             =
 9.9999999999999995e-07
  dual_inf      =  1.0184827638240758e+03   acceptable_dual_inf_tol_    =
 1.0000000000000000e+10
  constr_viol   =  0.0000000000000000e+00   acceptable_constr_viol_tol_ =
 1.0000000000000000e-08
  compl_inf     =  4.5618525445151024e+00   acceptable_compl_inf_tol_   =
 1.0000000000000000e-02
  curr_obj_val_ =  2.7727963512437492e-01   last_obj_val                =
 1.3239460189118296e-01
  fabs(curr_obj_val_-last_obj_val_)/Max(1., fabs(curr_obj_val_)) =
 1.4488503323319196e-01 acceptable_obj_change_tol_ =  1.0000000000000000e+20
test iter = 2
The current filter has 0 entries.
Relative step size for delta_x = 1.790897e-01
minimal step size ALPHA_MIN = 6.253269E-14
Starting checks for alpha (primal) = 1.00e+00


On Tue, Apr 3, 2012 at 9:02 PM, Ming Ji <finalguy at gmail.com> wrote:

> I am trying to solve a NLP problem with IPOPT. I noticed that constraints
> can be violated during the optimization. I need to take sqrt to estimate
> one term in my target function. So it is natural to add a constraint to
> make sure the sqrt calculation is always valid. However, during the
> iterations, IPOPT use some trial parameters that violate this constraint.
> The optimization almost always terminates before it finds any solution. Any
> work around for this?
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://list.coin-or.org/pipermail/ipopt/attachments/20120403/722b9812/attachment.html>