reducing the StepTolerance in order to avoid MATLAB stopping integration

Hi,

Please, i would like to reduce the StepTolerance in order to avoid the following message:

Warning: Failure at t=6.848966e-01. Unable to meet integration

tolerances without reducing the step size below the smallest value

allowed (2.433242e-15) at time t.

This is my script:

%initial conditions

y0=[0.02352;0.00048;0.0288;0.00432;0.216;0.1104;0.1104;2;2;2;55;50;0.5];

h=0.0006944444;

tSpan=[0 535];

options = optimoptions(options,'StepTolerance',1e-20);

[tSol, ySol]=ode23tb(@(t, y) MBBRFun4(t,y), tSpan, y0, options);

Please, let me know why this is not working.

Thanks in advance

Answer 1

[Sai Bhargav Avula]

Hi,

I think this question(same question) is answered in the following link : https://www.mathworks.com/matlabcentral/answers/487243-how-do-i-change-steptolerance

[KIPROTICH KOSGEY]

Thank you