|
Did you check the permissions on the metadata.db file at the base of the calibre library location? I would have thought that was the file the error message was referring to rather than the downloaded file itself.
Note also that when a file is imported into calibre it will make its own internal copies of the file. Calibre therefore needs to have full read/write permissions to the location specified for the calibre library so that it can create its internal working directories and files.
|