The executable files I generated using application compiler has error message, because it doesn't recognize the neural network functions

I used neural network NARX in my functions, and then I used the application compiler to generate a standalone application so others can use it to run it. However, it gives the error like the following " FCN is not the name of a function on the Matlab path, Error in => nameofthefunction.m at line 140". Where line 140 call the function of narxnet, FCN is just a parameter used in NARX. I wonder how to include neural network package in my application compiler so the exe file can run.