error metawidget file object has no attribute ''opf file''

[noemiri]

Hello everyone,

I am trying to convert an EPUB to PDF in the Calibre app.
But I get this error

How can I fix it?
I have already installed the Kepub Output and Metareader plugins.


calibre 7.3 embedded-python: True
Windows-10-10.0.22000-SP0 Windows ('64bit', 'WindowsPE')
('Windows', '10', '10.0.22000')
Python 3.11.5
Windows: ('10', '10.0.22000', 'SP0', 'Multiprocessor Free')
Interface language: it
Successfully initialized third party plugins: Highlights to Obsidian (1, 4, 1) && KePub Metadata Reader (3, 4, 3) && KePub Output (3, 6, 6)
Traceback (most recent call last):
File "calibre\gui2\convert\single.py", line 288, in accept
AttributeError: 'MetadataWidget' object has no attribute 'opf_file'

[kovidgoyal]

what are you doing to coonvert this file? What steps are you taking?

[noemiri]

Originally Posted by kovidgoyal

what are you doing to coonvert this file? What steps are you taking?

I open the EPUB on Calibre and than click on ''convert'' --> TO PDF

[kovidgoyal]

I dont see how you could possibly be getting that error with those steps. https://www.mobileread.com/forums/sh...d.php?t=186697

[noemiri]

Originally Posted by kovidgoyal

I dont see how you could possibly be getting that error with those steps. https://www.mobileread.com/forums/sh...d.php?t=186697

What?
Can you explain it please? I Don't understand
what is the solution?

[DNSB]

What errors do you see if you open the ePub in calibre's e-book editor? I would suggest installing the epubcheck plugin for the editor and using that as well as the built-in bugcheck.

Alternately, save a backup copy of your epub and do an epub to epub conversion to see if that fixes your issues.

If you clicked on the link supplied by Kovid, it lists the steps needed to report conversion issues.

In this case, I would suggest that your "epub" is not a valid epub since no opf file is found. The path to the .opf file must be specified in the container.xml file in the META-INF directory in the .zip container (an ePub is a renamed .zip file).

Sample container.xml file below (the path to the .opf file is bolded):

<?xml version="1.0" encoding="UTF-8"?>
<container version="1.0" xmlns="urn:oasis:names:tc:opendocument:xmlns:container">
    <rootfiles>
        <rootfile full-path="OEBPS/content.opf" media-type="application/oebps-package+xml"/>
   </rootfiles>
</container>

If the file was obtained from a retail store, can you please supply the title/author/ISBN?