"Not a Valid Font"

enuddleyarbl · 09-30-2022, 11:22 AM

In several books, the Calibre Editor puts a red shield with an exclamation mark in it next to some font files (the book I'm currently looking at (CS Friedman's "This Alien Shore" from Amazon) says they're .otf files. The hover text for those files simply says "Not a Valid Font." From what I've been able to find, there's no way to fix those fonts. Is that correct? Out of curiosity, is there any way to find out in what way the fonts are broken?

kovidgoyal · 09-30-2022, 12:31 PM

It means the font files are corrupted, basically trying to read the font name from the file failed.

09-30-2022, 11:22 AM	#1
enuddleyarbl Guru Posts: 734 Karma: 1077122 Join Date: Sep 2013 Device: Kobo Forma	"Not a Valid Font" In several books, the Calibre Editor puts a red shield with an exclamation mark in it next to some font files (the book I'm currently looking at (CS Friedman's "This Alien Shore" from Amazon) says they're .otf files. The hover text for those files simply says "Not a Valid Font." From what I've been able to find, there's no way to fix those fonts. Is that correct? Out of curiosity, is there any way to find out in what way the fonts are broken?

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09-30-2022, 12:31 PM	#2
kovidgoyal creator of calibre Posts: 43,866 Karma: 22666666 Join Date: Oct 2006 Location: Mumbai, India Device: Various	It means the font files are corrupted, basically trying to read the font name from the file failed.

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