RFC_CALL_TRANSACTION_USING is a standard SAP function module available within R/3 SAP systems depending on your version and release level. Below are the pattern details for this FM showing its interface including any import, export parameters etc and for your convenience any standard documentation available. All this information and more can be viewed if you enter the function module name RFC_CALL_TRANSACTION_USING into the relevant SAP transaction such as SE37 or SE80.
CALL FUNCTION 'RFC_CALL_TRANSACTION_USING' "Verification Program for Execution of RFCs via CALL TRANSACTION USING * EXPORTING * tcode = 'SE38' " sy-tcode Transaction * mode = 'N' " sy-batch 'N' - no display, 'E' - display if error, 'A' - Al IMPORTING subrc = " sy-subrc SY-SUBRC of CALL TRANSACTION USING TABLES bt_data = " bdcdata BDC table for batch input l_errors = " bdcmsgcoll Error list . " RFC_CALL_TRANSACTION_USING