EPUB validation error – missing image file in Calibre

Luxfort · Yesterday, 12:20 PM

Hello,

I have an EPUB book that I am trying to validate, but I cannot resolve a validation error.

The validator reports a missing image resource:

media/file38.png

I have checked the EPUB in Calibre and tried searching the files, but I have not been able to locate the reference that causes this error.

The book contains an About the Author section with an author photograph. I have checked the image files, but I am still unsure where the incorrect reference is located.

Could someone please explain how I can find the reference to this missing image and correct the EPUB?

I am using Calibre on Windows.

Thank you for your help!

theducks · Yesterday, 07:17 PM

Images can be in the CSS (they are usually Backgrounds).
Didn't the debug message say (right side) where it was called from?

JSWolf · Yesterday, 07:21 PM

Usually images in CSS are for section breaks.

DNSB · Yesterday, 07:24 PM

They can also be used for background images. In one memorable ePub, the cover image was linked in the CSS as a background image with no foreground text (memorable as in who created this piece of crap).

JSWolf · Yesterday, 07:26 PM

Quote:

Originally Posted by DNSB

They can also be used for background images. In one memorable ePub, the cover image was linked in the CSS as a background image with no foreground text (memorable as in who created this piece of crap).

Who created that crap?

DNSB · Yesterday, 07:52 PM

I actually don't know. It was a selfpubbed book and the only credit in the copyright was Formatting by Greenman. No link or any other information.

Yesterday, 12:20 PM	#1
Luxfort Junior Member Posts: 1 Karma: 10 Join Date: Nov 2026 Device: none	EPUB validation error – missing image file in Calibre Hello, I have an EPUB book that I am trying to validate, but I cannot resolve a validation error. The validator reports a missing image resource: media/file38.png I have checked the EPUB in Calibre and tried searching the files, but I have not been able to locate the reference that causes this error. The book contains an About the Author section with an author photograph. I have checked the image files, but I am still unsure where the incorrect reference is located. Could someone please explain how I can find the reference to this missing image and correct the EPUB? I am using Calibre on Windows. Thank you for your help!

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Yesterday, 07:17 PM	#2
theducks Well trained by Cats Posts: 32,047 Karma: 65700000 Join Date: Aug 2009 Location: The Central Coast of California Device: Kobo Libra2,Kobo Aura2v1, K4NT(Fixed: New Bat.), Galaxy Tab A	Images can be in the CSS (they are usually Backgrounds). Didn't the debug message say (right side) where it was called from?

Yesterday, 07:21 PM	#3
JSWolf Resident Curmudgeon Posts: 85,529 Karma: 154365185 Join Date: Nov 2006 Location: Roslindale, Massachusetts Device: Kobo Libra 2, Kobo Aura H2O, PRS-650, PRS-T1, nook STR, PW3	Usually images in CSS are for section breaks.

Yesterday, 07:24 PM	#4
DNSB Bibliophagist Posts: 55,592 Karma: 182544312 Join Date: Jul 2010 Location: Vancouver Device: Kobo Sage, Libra Colour, Lenovo M8 FHD, Paperwhite 4, Tolino epos	They can also be used for background images. In one memorable ePub, the cover image was linked in the CSS as a background image with no foreground text (memorable as in who created this piece of crap).

Yesterday, 07:52 PM	#6
DNSB Bibliophagist Posts: 55,592 Karma: 182544312 Join Date: Jul 2010 Location: Vancouver Device: Kobo Sage, Libra Colour, Lenovo M8 FHD, Paperwhite 4, Tolino epos	I actually don't know. It was a selfpubbed book and the only credit in the copyright was Formatting by Greenman. No link or any other information.