The client entered the USER and PASS command. The setuid function issued by the FTP server failed, indicating that the UID is incorrect.
The login to the user ID on the server system is rejected. Control is returned to the client for further command processing.
Contact the system programmer.
Verify that the UID in the OMVS segment associated with the user ID that is logging in is valid. A previous 530 reply should contain further information in the reason code field.