Use function modules 
Use function modules
You can call function modules to check database entries, set tables, delete data, etc.in a test case using the CATT function FUN. The calls of function modules in FUN commands are generated dynamically at runtime.
If changes are made to a function module which is used in test cases which change the parameters, you must change the CATT function FUN in the procedure. Other changes are made automatically because of the dynamic generation of the CATT interfaces. Run the program
RSCATINI to get an overview of all function modules in CATT.The program produces a log of generated function module CALL interfaces.