[Coin-ipopt] Call for help

[Roy Chen]

Hi, there

I have the following problems when I ran the problem:

In iteration 132, 7 Slacks too small, adjusting variable bounds
In iteration 133, 7 Slacks too small, adjusting variable bounds
In iteration 135, 7 Slacks too small, adjusting variable bounds
In iteration 136, 7 Slacks too small, adjusting variable bounds
In iteration 137, 7 Slacks too small, adjusting variable bounds
In iteration 139, 7 Slacks too small, adjusting variable bounds
In iteration 140, 7 Slacks too small, adjusting variable bounds
In iteration 141, 7 Slacks too small, adjusting variable bounds
In iteration 143, 7 Slacks too small, adjusting variable bounds
Restoration phase is called at point that is almost feasible,
  with constraint violation 3.205075e-12. Abort.

Number of Iterations....: 144

                                   (scaled)                 (unscaled)
Objective...............:  -7.9195441218271328e+04   -2.6926450014212250e+05
Dual infeasibility......:   1.5625000000000000e-02
5.3124999999999999e-02
Constraint violation....:   0.0000000000000000e+00    0.0000000000000000e+00
Complementarity.........:   1.4323837401800188e-09    4.8701047166120633e-09
Overall NLP error.......:   1.0028497388717635e-12
5.3124999999999999e-02


Number of objective function evaluations             = 923
Number of objective gradient evaluations             = 146
Number of equality constraint evaluations            = 923
Number of inequality constraint evaluations          = 923
Number of equality constraint Jacobian evaluations   = 146
Number of inequality constraint Jacobian evaluations = 146
Number of Lagrangian Hessian evaluations             = 145
Total CPU secs in IPOPT (w/o function evaluations)   =      1.141
Total CPU secs in NLP function evaluations           =      0.179

EXIT: Restoration Failed!
Restoration failed or stop at tiny step: we don't know about optimality, but
we have feasibility!!
--- Reading solution for model inv_case2
--- s6-p6-c6-seg3-ipopt-nonit.gms(399) 4 Mb 1 Error
*** Status: Execution error(s)
--- Job s6-p6-c6-seg3-ipopt-nonit.gms Stop 12/22/07 02:38:15 elapsed 0:0

What should I do with the IPOPT option file to eliminate this error

Best,

Roy
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