ORA-31670: Username argument must be specified and non-null

Cause: Called change user with a NULL username or a null string

Action: Specify a valid username argument. If this error occurs from a Data Pump client (e.g. expdp or impdp), try the operation again. If the error occurs again, contact Oracle Customer Support and report the error

Back to previous menu

https://support.oracle.com/
http://www.oracle.com/