Pixhawk Build and Run Error

Hi Guys

I downloaded the PX4 Tool Chain and opened the simulink model, When i click Build Model the follwing error comes up, really appreciate if you can help me with this. thanks!!!

From where do i access the Configuration references and set the parent and child?

• _The following Configuration parameter option(s) do not match between the models 'px4demo_attitude_system (Parent)' and 'px4demo_attitude_control (Child)'. Configuration references can help avoid parameter mismatches.

SupportNonInlinedSFcns [Use set_param to change settings]: Parent setting: off Child setting: on_***