Why This ABAP Funtion Module Always Set the Importing Parameter with <Initial>?

Question

We have a function module which contains an importing parameter IS_USER, which is of type S_USER, S_USER is a structure and contains the following fields:

USER_ID USER_ID CHAR 60

IP_ADDR IP_ADDR CHAR 16

SESSION_ID SESSION_ID CHAR 20

LANGU SPRAS LANG 1

MACHINE_NAME MACHINE_NAME CHAR 128

SAP_PASSPORT SAP_PASSPORT STRING 0

EXTRA_DATA STRING 0

When test run the function module in SE37, the parameter IS_USER always have the "<"Intial">" text and no field in it can be modified. Does anyone know what's wrong here?

Answer 1

You need to take the string out of your custom data structure if you want to use SE37 to test your FM. The SE37 test screen doesn't like deep structures.

If you must use a string you'll need to write a test program rather than using SE37.