Function ModuleYou have the following options for defining a function module as the processing method for a symbol:
In Customizing for Basic Data and Tools
in the detail screen of the IMG activity Check and Specify Report Symbols
When editing the layout of a document template on the Symbol
tab page as the expansion mode
NM and expansion parameter M
The entry on the tab page has higher priority.
The function module must correspond to a specific interface. The system checks both in Customizing as well as when you use a method in a layout, whether the function module is active in the system and whether it corresponds to the defined interface.
Note
For creating new function modules, see also the documentation on the comparison function module C14N_SYMBOL_METHOD. The function group C14N contains other programmed function modules for data processing that can serve as templates.