how to change the step tolerance or constraint tolerance in fmincon?

I am working with fmincon and my work is to minimize the cost for t= 24 when i run my code it work for t=1 to t=17 but after that it show me the following error:

"No feasible solution found.

fmincon stopped because the size of the current search direction is less than

twice the default value of the step size tolerance but constraints are not

satisfied to within the default value of the constraint tolerance. "

how i resolve this problem please help me.....

Thank You!!!!

Answer 1

[Sai Bhargav Avula]

Hi,

The answer to why this occurs is explained in the following link 3rd part

https://www.mathworks.com/matlabcentral/answers/218418-hi-i-tried-to-use-fmincon-but-i-received-the-message-how-i-can-overcome-this-problem

You can use the optimoptions function to change the tolerance values like

options = optimset('fmincon','StepTolerance',1e-10);
fmincon(....., options);

Hope this helps!

[Maham Arooj]

no it's also not work and it also show an error.

Unrecognized parameter name 'TolCol'

[Sai Bhargav Avula]

I have updated the answers for better understanding. Kindly check that

[Maham Arooj]

Thank you!!!