Oracle® Database 11g / 12c / 18c error codes ORA-00404: Convert file not found: [string]

ORA-00404: Convert file not found: [string]

Oracle Error Code: ORA-00404

Cause: The file used for converting the database from V7 to V8 could not be found.

Action: Verify that the migration process has been started on this database and that the convert filename is accessable.