"FAST_Sizes" Error in Simulink

Hi, Bonnie,
Thank you very much for your answers and help. I become this error by simulate the OpenLoop model in simulink: I

Error occurred while executing External Mode MEX-file ‘rtwinext’:
Error loading real-time image: undefined symbol “FAST_Sizes”

Please, how can I solve this error.

Thank you in advance.
Best regards,