Configure Model as AUTOSAR Component for a model having Simulink Function

Hi,

I am trying to configure Model as AUTOSAR Component by clicking on code-> C/C++ Code -> configure Model as AUTOSAR Component

But I am getting the following error:

"Mapping a Simulink function to an AUTOSAR runnable is not supported for this model. To map a Simulink function to an AUTOSAR runnable, reconfigure the model to use top-model, export-function modelling style."

And i am not getting how to reconfigure the model in the specified way.

Can anyone help me to resolve this error.

Note : I am working on MATLAB2015B.

Thanks inadvance.