Data Interfaces

Destinations BACK, SPACE and NONE
System A System B
...
CALL FUNCTION 'B'
DESTINATION 'B'
...
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FUNCTION A.
...
ENDFUNCTION.
Result A
Result B
FUNCTION B.
...
...
CALL FUNCTION 'A'
DESTINATION
ENDFUNCTION.
'BACK'
When executing a RFC function, you can call an RFC-enabled function in the calling system with
CALL FUNCTION ... DESTINATION 'BACK'. You can use the BACK destination with RFC
between two R/3 systems and between R/3 and external C programs (RFC SDK), as well as with the
RFCDES connection types 3 and T.
Two functions can call each other recursively.
If you want to execute a function module locally, you specify the destination SPACE.
You specify the destination NONE if you want to execute a function module locally, but the call to be
performed is technically a REMOTE call (i.e. via a gateway). (See RFC test without partner system.)