OCI-28191
cannot grant administrative privileges to a user with non-ASCII or non-EBCDIC characters in the user name
Cause
Attempt to grant an administrative privilege to a user failed. Administrative privileges like SYSDBA, SYSOPER, SYSASM, SYSBACKUP, SYSDG, and SYSKM cannot be granted to a user with non-ASCII or non-EBCDIC characters in the user name.
Action
Grant administrative privileges to a user whose name contains ASCII or EBCDIC characters only.