fmincon and optimization with a symbolic matrix

I am working on the following optimization problem

syms t [1 16] 
tt=reshape(t,[4],[4]);
a=tril(tt);
chi1=trasnpose(a)*a;
chi=randn(4,4); 
fun=(chi1-chi).^2;
g=matlabFunction(fun)
gs=GlobalSearch;
opts=optimoption(@fmincon,'Algorithm','interior-point');
problem = createOptimProblem('fmincon','x0',[],'objective',g,'lb',[],'ub',[],'options',opts)

and I am getting an error

Undefined function 'optimoption' for input arguments of type 'function_handle'.
opts=optimoption(@fmincon,'Algorithm','interior-point');

I read on forum that fmincon doesn't solve symbolic problem so I tried another solver 'lsqnonlin' and lsqlin, but encountering a similar problem. Any help will be appreciated.

Answer 1

[Steven Lord]

The function is optimoptions (plural) not optimoption (singular).

[ali akbar]

Einstein was right, human stupidity has no bounds. Silly me. It solved the problem.