Hi Gekkouga,
I understand that you are facing an "infeasible solution" error while using the "fmincon" function in MATLAB.
Based on the shared information, the solver converges to a feasible solution for a specific lower and upper bound. However, as the bounds are increased, the solver is unable to provide with a solution.
"fmincon" is a gradient based solver based on the bounds provided. When changing the bounds, the gradient range may change affecting the solution. Since the bounds are increased, I assume that both lower and upper bound values are increased.
On increasing the lower bound, some range of the initial bound will be skipped. It may happen that the solution point lies in this skipped bound region for a specific set of equations and constraints.
Without knowing the equations and constraints, it is not possible to comment exactly on the cause of this error.
Hope this helps.
Regards,
Nipun
