Calling an @ file from the the Control toolbox

I have created a .m file to be called by Dynare.

From it, I need to call the routine ss.m from the the Control toolbox in Matlab. It is located in
\MATLAB\R2016a\toolbox\control\ctrlmodels@ss

Dynare is unhappy when calling this, presumably because of the @ tag in the name.

How can I call this successfully?

Please try putting this command into an

verbatim; end;
block