ABAP CALL FUNCTION BACKGROUND PARA Statement syntax, information and example SAP source code

CALL FUNCTION - IN BACKGROUND parameter_list

Short Reference

ABAP Syntax ... [EXPORTING p1 = a1 p2 = a2 ... ]
[TABLES t1 = itab1 t2 = itab2 ...] ... .

What does it do? These additions are used to assign actual parameters to the formal parameters of the function module. The additions have the same meaning as in the
synchronous RFC with the exception that the values with IMPORTING
and CHANGING cannot be adopted and return values can only be assigned to class-based exceptions.