https://forums.sdn.sap.com/thread.jspa?threadID=22598
>시스템 디버깅은 시스템 펑션의 디버깅도 가능한 줄 알았는데..
>XXPASS같은 시스템 펑션은 디비깅이 안되는데요..
>차이점이 무엇인지 고수님들의 설명좀 부탁 드리겠습니다..^^
SAP has specific protection against the things you've tried. These "illegal" or "forbidden" calls are described in SAP Note No. 301894, along with the "legal" calls such as function module SUSR_USER_CHANGE_PASSWORD_RFC (which verifies the current password).