Can't schedule backup
 

Although I can backup manually, every time I try to schedule a backup for this particular drive I get the following message:

The document “Untitled” could not be exported as “Rock”. The file does not exist.

The drive contains mostly music files and isn't a boot drive. It just contains data. I can find several files containing the word "Untitled" as part of the name, but all back up successfully manually, and all are real files.

How can I fix this problem? Any assistance much appreciated

Do you have a slash in the name of the source or destination volumes?