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eschwartz · 11-20-2014, 06:16 PM

That OPF file is a backup of the metadata in the database. It should be left alone, the only thing renaming it will do is leave an orphaned file in your calibre library -- and deprive you of the backup. Fortunately, calibre will recreate it next time you edit the metadata.

It is not meant to be opened in the viewer either. In fact, it is not shown in the UI at all.

What are you trying to accomplish here? There is probably a better way.

11-20-2014, 06:16 PM	#5
eschwartz Ex-Helpdesk Junkie Posts: 19,421 Karma: 85400180 Join Date: Nov 2012 Location: The Beaten Path, USA, Roundworld, This Side of Infinity Device: Kindle Touch fw5.3.7 (Wifi only)	That OPF file is a backup of the metadata in the database. It should be left alone, the only thing renaming it will do is leave an orphaned file in your calibre library -- and deprive you of the backup. Fortunately, calibre will recreate it next time you edit the metadata. It is not meant to be opened in the viewer either. In fact, it is not shown in the UI at all. What are you trying to accomplish here? There is probably a better way. Last edited by eschwartz; 11-20-2014 at 06:18 PM.