I have a multivariable non-linear regression code which was working fine in Matlab 2014b. Now setting the options for lsqcurvefit (or any fit) throws an error in Matlab 2020a. I am following the documentation. Does any toolbox need to be activated for this code snippet?
options = optimoptions('lsqcurvefit');
% Throws this error:
% Error using optimoptions (line 124)
% Empty keys are not allowed in this container.