To prevent this error, modify the System object to avoid code that does not support code generation.

when i want to build fm demodulator on raspberry pi ,it return errors because code generation.....

Code Generation  1
Elapsed: 11 sec
### Generating code into build folder: C:\Users\root\Desktop\ghi\RTLFM_ert_rtw
### Build procedure for model: 'RTLFM' aborted due to an error.
Simulink detected an  error 
 'The number of input rows must be a multiple of the decimation factor.'.

   The error occurred for MATLAB System block 'RTLFM/FM Broadcast  Demodulator Baseband'.    

   To prevent this error, modify the System object to avoid code that does not support code generation.

you can see snapshot of it

How i can built it with out code generation and matlab coder...........

please help

best regards stackprogramer