Error while validating model function prototypes for model

Hi, Does anyone know what the following error means and how to deal with it?

"Error while validating model function prototypes for model: The storage class of the signal connected to port 'Out1' is a non-Auto storage class, thus the generated code is not Function Prototype Control feature compliant."

Currently, I have set the data type of the signal that goes to output port 'Out1' to boolean.I also tried setting it to Auto, but the error still appears when I try to generate code from the model.

Thanks!

[Kaustubha Govind]

Are any upstream signals set to have a non-Auto storage class? Upstream signals are those emanating from blocks that are before the 'Out1' block in the signal flow.

[Rahul]

There is a signal going to this output port "Out1". The data type of the signal is set to boolean. I also tried to set it to 'Auto', but the error still remains.

[Nazneen Sayyad]

I am facing the same problem. How did you resolve?

Answer 1

[Juan Reyes]

Specify your signals code generation options->storage class as "auto"

As shown here: http://www.mathworks.com/help/simulink/slref/simulink.signal.html#zmw57dd0e258765