help in HDL coder for fft

[vidh]

hai,
I have designed a model for OFDM in matlab simulink , and i am finding problem in converting "FFT,and IFFT" simulink block into VHDL code using "HDL coder". so can anyone help me , please. its very important for me.
when ever i am trying with HDL coder it is giving an error message of "cannot implement the code for fft block".

 

[TrickyDicky]

HDL coder only supports a subset of simulink and embedded M. I suggest you learn what the subset is and then covert the FFT to use the supported features.