Hi Besme James, from your query it can be taken that you are trying to use C caller block to call your pre-defined C program. From the statements I assume you have added the header files, source codes in the Configuration parameters -> Simulation target. Ensure that you have enabled both:
- Import custom code
- Enable global variables as function interfaces
To use the input variables from the custom code inside Simulink.
The following documentation may be helpful:
