ORA-19694: some changed blocks were not found in the change tracking file

ORA-19694: some changed blocks were not found in the change tracking file

Cause: A backup or copy found that some changed blocks had not been recorded in the change tracking file. The details of which files and blocks are affected will be in an Oracle trace file.

Action: This indicates that there is a problem with the change tracking feature. Disable change tracking and re-start the backup.