RFC and programming information for RFC client/server programs can be summarized as follows:
- An RFC connection is always initiated by an RFC client program.
- An RFC connection is always built up in two steps:
- Connection from an RFC client to the SAP gateway
- Connection from the SAP gateway to an RFC server
- There are different ways of starting or connecting to an RFC server program:
- An RFC server program can be started by the SAP gateway, by the currently running SAPGUI or by the currently running application server.
- From R/3 Release 3.0C onwards, you can register an RFC server program at an SAP gateway. The program waits for RFC requests from SAP Systems.
For program start-up options while establishing an RFC connection, see
