method IF_RSPLS_CR_METHODS~DERIVE.

* Field Symbol declarations........................
  FIELD-SYMBOLS: <LFS_USERNM> TYPE ANY,
                 <LFS_TMSTMP> TYPE ANY.

* Local data declarations............................
  DATA: LW_OITCTLSTCHNG TYPE /BI0/OITCTLSTCHNG.

* Concatenate Current Date and Time to form the TimeStamp..
  CONCATENATE SY-DATUM SY-UZEIT INTO LW_OITCTLSTCHNG.

* Check if the User field is available in the interface
* Structure C_S_CHAS, if found pass the User Name to it.
  ASSIGN COMPONENT 'USERNAME'  OF STRUCTURE C_S_CHAS TO <LFS_USERNM>.
  IF SY-SUBRC = 0.
    <LFS_USERNM> = SY-UNAME.
  ENDIF.                               " IF SY-SUBRC = 0.

* Check if the TimeStamp field is available in the interface
* Structure C_S_CHAS, if found pass the TimeStamp to it.
  ASSIGN COMPONENT 'TCTLSTCHNG' OF STRUCTURE C_S_CHAS TO <LFS_TMSTMP>.
  IF SY-SUBRC = 0.
    <LFS_TMSTMP> = LW_OITCTLSTCHNG.
  ENDIF.                               " IF SY-SUBRC = 0.

endmethod.