<pre>Hi,
I have integrated IPOpt in my code. It runs fine for smaller test cases, but for all
bigger test cases ( variables > 1000 ) it executes for a long time and gives me the
following error.
==========================================================================
Total number of variables............................: 6704
variables with only lower bounds: 0
variables with lower and upper bounds: 6704
variables with only upper bounds: 0
Total number of equality constraints.................: 2271
Total number of inequality constraints...............: 7145
inequality constraints with only lower bounds: 0
inequality constraints with lower and upper bounds: 6704
inequality constraints with only upper bounds: 441
iter objective inf_pr inf_du lg(mu) ||d|| lg(rg) alpha_du alpha_pr ls
0 4.1255458e+003 2.10e-001 1.34e+000 0.0 0.00e+000 - 0.00e+000 0.00e+000 0
Exception of type: INTERNAL_ABORT in file "IpPDPerturbationHandler.cpp" at line 253:
Exception message: retval evaluated false: get_deltas_for_wrong_inertia returns false.
Number of Iterations....: 0
(scaled) (unscaled)
Objective...............: 4.1255458316100949e+003 4.1255458316100949e+003
Dual infeasibility......: 1.3383911269052646e+000 1.3383911269052646e+000
Constraint violation....: 1.0999978900000862e-001 1.0999978900000862e-001
Complementarity.........: 1.0000000099999999e+001 1.0000000099999999e+001
Overall NLP error.......: 1.0000000099999999e+001 1.0000000099999999e+001
Number of objective function evaluations = 1
Number of objective gradient evaluations = 1
Number of equality constraint evaluations = 1
Number of inequality constraint evaluations = 1
Number of equality constraint Jacobian evaluations = 1
Number of inequality constraint Jacobian evaluations = 1
Number of Lagrangian Hessian evaluations = 2
EXIT: INTERNAL ERROR: Unknown SolverReturn value - Notify IPOPT Authors.
IPOpt TIME : 12263 s
=========================================================================
Any ideas ?
Thanks,
~ Sonia
</pre>