Communication Between R/3 Systems (SAP Library - SAP Communication: CPI-C Programming (BC-CST-GW))

Communication Between R/3 Systems

Purpose

An ABAP program in an R/3 System uses an RFC or CPI-C call to start an ABAP program in another R/3 System, and exchanges data with this program.

With this constellation, you must note the following guidelines:

Choose the target system using transaction SM59.
The called function must be an ABAP function module, which has the "remote" ID in the function library.

For more details on the RFC interface, refer to the documentation Remote Communications.

The calling ABAP program must build the data for the logon to the target system, convert it to EBCDIC and receive the response (possibly a denial) from the target system.
The side info table TXCOM must be configured in the calling R/3 System. For this, use transaction code SM54.

For details on the configuration of TXCOM, refer to the relevant topic in the following documentation:

The target ABAP program must contain the form routine specified in the connect data.

For details on CPI-C calls, refer to the topic CPI-C Implementation in ABAP.