Is there any way to jump to a subroutine without returning the place form where the perform has been executed:
Within the standard ATP check program the ATP core logic is located between two user exit dedicated form (user_exit_in and user_exit_out). I would like to by pass the standard AVAILABILITY_CHECK_CONTROLLER FM logic in enhancing this FM in ZAVAILABILITY_CHECK_... . THerefore I thought to call the user_exit_out from the user_exit_in and call my z FM from here.
No it is not possible.
You can jump out of the program but not at specific location.