Cannot fix font problem- unrenderable font?

Carlwitthoft · Yesterday, 10:24 AM

I had an online service convert a PDF book to EPUB. The contents display only the "questionmark in a box" failure icon, see attached image.
I checked, and the the raw text does exist inside the html code.
There is a font listed under the name " -apple-system " . I tried to use the editor "change font" option but no change happens. I don't know whether this nonexistent font is the cause of the problem or not.
Can anyone explain how to modify the epub contents so that the text will render in a readable font?

Doitsu · Yesterday, 06:22 PM

Create a copy of the epub and remove Arial and/or Georgia. If that does not fix your problem, most likely the HTML files are incorrectly encoded. E.g. Windows-1252 instead of UTF-8.

Carlwitthoft · Yesterday, 06:34 PM

Quote:

Originally Posted by Doitsu

Create a copy of the epub and remove Arial and/or Georgia. If that does not fix your problem, most likely the HTML files are incorrectly encoded. E.g. Windows-1252 instead of UTF-8.

Never mind - it's a completely different issue. I discovered that the output EPUB renders just fine with other "reader" apps. It's Calibre itself that is suddently unable to render the text in the display window or in the "ebook-viewer.app" that Calibre uses.
If this persists beyond a reboot I'll open a separate bug report

Yesterday, 10:24 AM	#1
Carlwitthoft Junior Member Posts: 2 Karma: 10 Join Date: Oct 2026 Device: none	Cannot fix font problem- unrenderable font? I had an online service convert a PDF book to EPUB. The contents display only the "questionmark in a box" failure icon, see attached image. I checked, and the the raw text does exist inside the html code. There is a font listed under the name " -apple-system " . I tried to use the editor "change font" option but no change happens. I don't know whether this nonexistent font is the cause of the problem or not. Can anyone explain how to modify the epub contents so that the text will render in a readable font? Attached Thumbnails

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Is there a way to fix this font?	Colonel Cathcart	Kobo Developer's Corner	7	05-26-2023 05:33 AM
Problem converting original PDF font to another PDF with a different font	Swifty4635	Conversion	0	03-03-2020 11:21 PM
Problem changing font size using font size key	Waylander	Conversion	0	10-02-2013 03:30 PM
Easy way to fix font on Sigil?	cupidmissed	Sigil	3	07-31-2012 05:53 PM
How do I fix small font of a ebook	Atagahi	Sony Reader	3	09-13-2010 03:05 PM

Yesterday, 06:22 PM	#2
Doitsu Grand Sorcerer Posts: 5,934 Karma: 24259515 Join Date: Dec 2010 Device: Kindle PW2	Create a copy of the epub and remove Arial and/or Georgia. If that does not fix your problem, most likely the HTML files are incorrectly encoded. E.g. Windows-1252 instead of UTF-8.

Advert