Oracle Solution for Error ora-19761

ORA-19761: block size string is not valid for change tracking file

What triggered the Error:

ile opening the specified change tracking file, it was found that the file header did not contain a valid logical block size. This probably means that the file is corrupt.

What should we do to fix it:

the file can be repaired, do so, otherwise disable and re-enable change tracking to re-initialize the file.