Execute embed function in sinmulink

Hi, My name is Viet. I'm studying in my project using embed function in Matlab simulink. When every step in the model (fix step) is executed, the embed function runs iterative 4 times. I think it had trouble in embed function but I can't repair it. Can you help me? Thanks

[Kaustubha Govind]

Please provide more information about what you mean by "it had trouble". Is there an error message? If so, post the error and the corresponding code.