When configuring the FTP tab on an RA FTP job I am using the built-in Commands. The Copy File(s) command has an option titled "Abort job when source file(s) not found". This option is greyed out and whether it is checked or not varies with the job. I have not been able to find any documentation for this option. Is it automatically set somehow? If so, by what? Or, can I somehow enable it and use it as needed?