[Bonmin] Need help : solving Integer problem with Bonmin + Ipopt

[Udit Kumar]

Hi Friends/Seniors,

I am new to the COIN-OR/BONMIN library, I just started playing it.

I am trying to solve pure integer problem without any constraints (only
upper and lower limit of variable are defined).

So I did modification in "MyTMINLP.cpp" file and when I am trying
to solve my problem it is giving me that "Ipopt has failed to solve a
problem", but I see last function evaluation was the solution of my problem,
then why "ipopt" is having difficulty to understand it..

I attached my modified file for your reference, Please help me. I will be
very thankful of you.



*Message shown during the run*
******************************************************************************
This program contains Ipopt, a library for large-scale nonlinear
optimization.
 Ipopt is released as open source code under the Common Public License
(CPL).
         For more information visit http://projects.coin-or.org/Ipopt
******************************************************************************
NOTE: You are using Ipopt by default with the MUMPS linear solver.
      Other linear solvers might be more efficient (see Ipopt
documentation).

point : (0.500000, 0.500000, 0.500000, 0.500000, 0.500000, 0.500000,
0.500000, 0.500000, 0.500000, 0.500000), obj_val : 3.181981
point : (0.252500, 0.005000, 0.005000, 0.005000, 0.005000, 0.005000,
0.005000, 0.005000, 0.005000, 0.252500), obj_val : 0.127879
point : (0.055042, 0.000050, 0.000050, 0.000050, 0.000050, 0.000050,
0.000050, 0.000050, 0.000050, 0.055042), obj_val : 0.006059
point : (0.000550, 0.000012, 0.000012, 0.000012, 0.000012, 0.000012,
0.000012, 0.000012, 0.000012, 0.000550), obj_val : 0.000001
point : (0.000025, 0.000000, 0.000000, 0.000000, 0.000000, 0.000000,
0.000000, 0.000000, 0.000000, 0.000025), obj_val : 0.000000
point : (0.000000, -0.000000, -0.000000, -0.000000, -0.000000, -0.000000,
-0.000000, -0.000000, -0.000000, 0.000000), obj_val : 0.000000
Problem status: 4
Objective value: 1.79769e+308
Ipopt has failed to solve a problem

Thanks & Regards,
Udit Kumar
MS(R) Student, IIT delhi, India
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