Auto generated code, parameter variable in header file not fetching data from the .c file.

Different parameters used in matlab are stored as variables inside a structure in the header file, and their respective data values are stored in a separate structure in a .c file. Is there anything that should be done before putting them together in a IDE, so that both the structures communicate properly with each other, to fetch data during execution. Because in my project am facing an issue with this aspect of the code, the structure variable of the parameter is not fetching the data properly from the .c file which possesses the data of the respective parameters.