- not a string of 32 hexadecimal characters
- an object identifier that already identifies an existing object
- an object identifier different from the original object identifier already assigned to the type
- An invalid name for a table, view, sequence, procedure, function, package, or package body was entered. Since the system could not recognize the invalid name, it responded with the message that the named object does not exist.
- An attempt was made to rename an index or a cluster, or some other object that cannot be renamed.