Code generation in matlab 2013b : With FPC and Signal conversion block.

I am facing error when i try to generate code in Matalab 2013b. in my model i am using Function Prototype Control(FPC) and Signal Conversion block.

Error :

- Inports are connected to Terminator blocks inside the subsystem or they are disconnected - Inports of the block are not connected from outside the block These modeling constructs are not supported by the Function Prototype Control block.

I have used Signal Converter becuase bus selector was not accepting mixed data types. My Input is "Simulink.Bus" having different data type elements