There are times when you want to access variables from a call program within a function module or user exit. Since...
you cannot define variables outside of the current program, try the following to complete this task.
*Step 1: Assign the program/field name of calling program variable to field symbol 1 assign '(zcall_program_name)fname_from_call_program' to <fs1>.
*Step 2: Assign field Symbol contents to field symbol 2 assign (<fs1>) to <fs2>.
*Step 3: Assign Field Symbol 2 to avariable in the current function module/Program vbak-vbeln = <fs2>.