Oracle Error Message
ORA-31460: logfile location string is not an existing directory
Reason for the Error
The directory specification for logfile location for the change source, does not correspond with an existing directory, or the directory was not accessible.
Solution
1. Create the directory if it does not exist. If the directory does exist, change the file system permissions so the directory can be accessed. OR 2. perform ALTER CHANGE SOURCE and change the logfile_location to be an existing directory that contains the logfiles