MegaCore Function Generation Error

Hi,

I got an error using the example file "topfft.mdl" in HIL tutorial offered by Altera.

When I open the"fft_stream" FFT control window and click on "Step 2: Generate" to update the FFT megacore function, error prompts out as follows:

"MegaCore FUnction Generation Error"

"IP Functional Simulation Model Creation Failed. Code==3".

My running enviroment is "DSP builder 16.1" and "Matlabe2015b"

How can I solve this problem?

Hou