ORA-28040:

This issue is caused by the default setting for allowed logon version in the 12 database.Note that the SQLNET.ALLOWED_LOGON_VERSION parameter has been deprecated in 12c. That parameter has been replaced by these: SQLNET.ALLOWED_LOGON_VERSION_SERVER=nSQLNET.ALLOWED_LOGON_VERSION_CLIENT=n Note that SQLNET.ALLOWED_LOGON_VERSION_CLIENT would be necessary on the server when the database is ‘acting’ as a client.  Such as the case of a Continue reading