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Not authorized to logon to the target system (error code 1002)

Updated May 18, 2018

Hello SAP Experts,

 An authority check for object S_RFCACL (expected to be assigned to the user in the target system) is performed in the target system while performing an RFC or HTTP communication between two ABAP systems using "Trusted System" for authentication.

The authorization checks fail because of insufficient authorization the "Trusted System" login attempt also fails.

An error message "You are not authorised to logon to the target system (error code 0)." is returned from caller side.

But in the target system, the Security Audit Logs shows successful login. Also, the login timestamp gets updated in the target system indicating a successful login.


  • 19 Dec 2016 7:02 pm Rohit Mahajan Helpful Answer

    The S_RFCACL authority check was performed after the (successful) authentication. But now the S_RFCACL check gets triggered while authentication process was going on, therefore, the entire authentication will also fail to result in a new error code: 1002.

    When you will apply the correction in the target system you'll notice different behaviour as described above:

    • An error message on the caller side will be now "You are not authorized to logon to the target system (error code 1002).".
    • Security Audit Log will now show: "RFC/CPIC logon failed, reason=1002, type=R, method=R" in the target system.