Hello dear all,
I run my NLP for to solve the EGC model exter and I got this message:
optimal solution . Reduced gradient less than tolerance
Can any one help me interpret this? If it's a problem how to solve it?
attached part of the lst file:
**** SOLVER STATUS 1 Normal Completion
**** MODEL STATUS 2 Locally Optimal
**** OBJECTIVE VALUE 1000.0000
** Warning ** The variance of the derivatives in the initial
point is large (= 6.2 ). A better initial
point, a better scaling, or better bounds on the
variables will probably help the optimization.
** Optimal solution. Reduced gradient less than tolerance.
thanks!!!
ECG Solving with NLP Solver
Re: ECG Solving with NLP Solver
From CONOPT documentation: https://www.gams.com/latest/docs/S_CONO ... N_MESSAGES
However, the warning message tells me that you can improve either initial point, or scaling of your model and can potentially get better results.
HTH.
- Atharv
This is not a problem.The solution is a locally optimal interior solution. The largest component of the reduced gradient is less than the tolerance rtredg with default value 1.e-7. The value of the objective function is very accurate while the values of the variables are less accurate due to a flat objective function in the interior of the feasible area.
However, the warning message tells me that you can improve either initial point, or scaling of your model and can potentially get better results.
HTH.
- Atharv