How to get tables used by a Function Module

Hi,

How to know the tables used by a function module dynamically.

Cuurently im using BAPI_MATERIAL_SAVEDATA in my report program.

I tried FM GET_TABLES to know the tables, but could see only tables used in the report.

Main issue in my case is when im running this update program, could observe different tables being displayed as updated in SM50(Process Overview).Want to clarify as why these tables which are not being used in my report are being displayed in SM50.

So was doubtin weather this FM is using these displayed tables.

Thanks in advance for u r replys.

Regards,

Dedeepya