Specifying drift and diffusion functions in SDE(financial toolbox)

Hello I am trying to simulate the following base SDE model using the financial toolbox

where are independent weiner processes

I wrote the drift and diffusion functions in two separate matlab functions in two separate files

function F=drf(t,X)
f1=0.1*X(1);
f2=0.1*X(2)
F=transpose([f1 f2])
end

function G=diffu(t,X)
G=[0.1 0;0 0.1]
end

But when i tried to create the sde object, by calling obj=SDE(drf,diffu) i got the following error

''Drift rate must be a 'Drift' function or a function''. I am using Matlab 2018. As far as i can see, the functions are of the correct dimensionality. What is wrong?