PRS-T2 Does not open newer epubs from Gutenberg

jaapd · 03-19-2020, 04:20 PM

My Sony PRS-T2N does not open newer epubs from Gutenberg.

The next two won't open:

http://www.gutenberg.org/ebooks/61324.epub.images

http://www.gutenberg.org/ebooks/61326.epub.images

Others work perfectly:

http://www.gutenberg.org/ebooks/31107.epub.images

http://www.gutenberg.org/ebooks/3176.epub.images

The software version is: 1.0.01.05100

Any idea?

hobnail · 03-19-2020, 06:23 PM

Can you explain what you mean by "does not open".

hobnail · 03-19-2020, 06:33 PM

With Calibre you can convert an epub which will simplify (sort of) the CSS. You don't need to convert it to another format first; for the output format set it to EPUB.

I've had some EPUBs that the Kobo Forma doesn't display properly; any error in the CSS (what it considers an error, that is) makes it ignore the entire CSS file.

jaapd · 03-20-2020, 08:37 AM

Quote:

Originally Posted by hobnail

Can you explain what you mean by "does not open".

When I click on the book on me e-reader, the e-reader flickers a little and then the same windows reappears. Or the start window, or a bookshelf window.

JSWolf · 03-20-2020, 09:32 AM

Quote:

Originally Posted by jaapd

When I click on the book on me e-reader, the e-reader flickers a little and then the same windows reappears. Or the start window, or a bookshelf window.

In Calibre, install the epubcheck plugin and load these books in the editor so you can check them. Use both the built in checker and epubcheck. Once both checkers say there are no errors, load them back on your T2 and try again.

Pajamaman · 03-20-2020, 10:35 AM

I find converting to mobi then back to epub fixes most things.

JSWolf · 03-20-2020, 11:35 AM

Quote:

Originally Posted by Pajamaman

I find converting to mobi then back to epub fixes most things.

I would rather look at the ePub to find out what's wrong with it. If you convert to Mobi and then back, you could be changing the layout.

stumped · 03-20-2020, 12:39 PM

from memory ( back when I had a sony reader) over-complicated code in the epub ( like multiple classes and spans within a single line) would overwhelm the reader and it would crash.
the code was not invalid, ( the books were fine in pc based renderers ) - just too hard for the reader renderer to cope with
you need to inspect the books or name them and ask others to, if they are PD from a public source

JSWolf · 03-20-2020, 12:52 PM

Quote:

Originally Posted by stumped

from memory ( back when I had a sony reader) over-complicated code in the epub ( like multiple classes and spans within a single line) would overwhelm the reader and it would crash.
the code was not invalid, ( the books were fine in pc based renderers ) - just too hard for the reader renderer to cope with
you need to inspect the books or name them and ask others to, if they are PD from a public source

Good idea to let us know which books so we can take a look and see what's up. PG ePub are machine converted and not always that great codewise.

Ghitulescu · 03-25-2020, 06:18 AM

ADE 4.0 opens both books but crashes as soon as one goes beyond the cover. I did not dare to put them on my Sonies.
Cleaning the css rules did not change anything.
Renaming all files (automatic or manual) did not improve the situation.

pdurrant · 03-25-2020, 06:25 AM

Wasn't there some limit on individual file sizes inside the ePub on the Sony readers?

stumped · 03-25-2020, 06:46 AM

sometimes a epub to peub conversion in calibre works wonders, and is faster tan a manual debug. try it and report back.
( if ADE crashes, there's more to it than jsut individual file size )

stumped · 03-25-2020, 06:53 AM

taking the first of your 2 links from #1. book opens ok in sigil, but it crashes ADE 2.0 when i try to move past the 1st page
using sigil code view, I see that in 2nd file of book, the body section is empty... maybe that is the issue
<body>
<div class="body">
</div>
</body>

trying my own suggestion of calibre to calibre convert...
the converted version works in ADE

but... looking at the converted file in calibre editor. there is still an empty body section
<body class="calibre">

<div class="front">
</div>
</body>
...
its like I said before, the conversion fixes stuff faster than a manual debug.
others may be curious enough to dig deeper though

actually , this is more likely- running a check in calibre editor ( after the conversion) if gives 154 errors, nearly all to do with unsafe characters, e.g.
The filename OEBPS/@public@vhost@g@gutenberg@html@files@61324@61324-h@61324-h-11.htm_split_001.html contains unsafe characters, that must be escaped, like this OEBPS/%40public%40vhost%40g%40gutenberg%40html%40files%4 061324%4061324-h%4061324-h-11.htm_split_001.html. This can cause problems with some e-book readers. To be absolutely safe, use only the English alphabet [a-z], the numbers [0-9], underscores and hyphens in your file names. While many other characters are allowed, they may cause problems with some software.

i have no idea if there is a mechanism to report a problem book to PG

Ghitulescu · 03-25-2020, 07:01 AM

Quote:

Originally Posted by pdurrant

Wasn't there some limit on individual file sizes inside the ePub on the Sony readers?

Yes, but the Sonies ignore anything that comes after...
I mean, they work normally, just the text is truncated at the limit.

stumped · 03-25-2020, 07:21 AM

Quote:

Originally Posted by Ghitulescu

Yes, but the Sonies ignore anything that comes after...
I mean, they work normally, just the text is truncated at the limit.

is not file size. it's the stuff in my previous post #13

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03-19-2020, 04:20 PM	#1
jaapd Junior Member Posts: 4 Karma: 10 Join Date: Mar 2020 Device: Sony reader	PRS-T2 Does not open newer epubs from Gutenberg My Sony PRS-T2N does not open newer epubs from Gutenberg. The next two won't open: http://www.gutenberg.org/ebooks/61324.epub.images http://www.gutenberg.org/ebooks/61326.epub.images Others work perfectly: http://www.gutenberg.org/ebooks/31107.epub.images http://www.gutenberg.org/ebooks/3176.epub.images The software version is: 1.0.01.05100 Any idea?

03-19-2020, 06:23 PM	#2
hobnail Running with scissors Posts: 1,552 Karma: 14325282 Join Date: Nov 2019 Device: none	Can you explain what you mean by "does not open".

03-19-2020, 06:33 PM	#3
hobnail Running with scissors Posts: 1,552 Karma: 14325282 Join Date: Nov 2019 Device: none	With Calibre you can convert an epub which will simplify (sort of) the CSS. You don't need to convert it to another format first; for the output format set it to EPUB. I've had some EPUBs that the Kobo Forma doesn't display properly; any error in the CSS (what it considers an error, that is) makes it ignore the entire CSS file.

03-20-2020, 10:35 AM	#6
Pajamaman Wizard Posts: 2,827 Karma: 10700629 Join Date: May 2016 Location: Canada Device: Onyx Nova	I find converting to mobi then back to epub fixes most things.

03-20-2020, 12:39 PM	#8
stumped Wizard Posts: 3,305 Karma: 10259306 Join Date: May 2016 Device: kobo forma, Kobo Libra, Huawei media Tab, fire HD10, PW3 HDX8.9,	from memory ( back when I had a sony reader) over-complicated code in the epub ( like multiple classes and spans within a single line) would overwhelm the reader and it would crash. the code was not invalid, ( the books were fine in pc based renderers ) - just too hard for the reader renderer to cope with you need to inspect the books or name them and ask others to, if they are PD from a public source

03-25-2020, 06:18 AM	#10
Ghitulescu Fanatic Posts: 563 Karma: 403106 Join Date: Aug 2014 Device: PRS-T1	ADE 4.0 opens both books but crashes as soon as one goes beyond the cover. I did not dare to put them on my Sonies. Cleaning the css rules did not change anything. Renaming all files (automatic or manual) did not improve the situation.

03-25-2020, 06:25 AM	#11
pdurrant The Grand Mouse 高貴的老鼠 Posts: 71,504 Karma: 306214458 Join Date: Jul 2007 Location: Norfolk, England Device: Kindle Voyage	Wasn't there some limit on individual file sizes inside the ePub on the Sony readers?

03-25-2020, 06:46 AM	#12
stumped Wizard Posts: 3,305 Karma: 10259306 Join Date: May 2016 Device: kobo forma, Kobo Libra, Huawei media Tab, fire HD10, PW3 HDX8.9,	sometimes a epub to peub conversion in calibre works wonders, and is faster tan a manual debug. try it and report back. ( if ADE crashes, there's more to it than jsut individual file size )

03-25-2020, 06:53 AM	#13
stumped Wizard Posts: 3,305 Karma: 10259306 Join Date: May 2016 Device: kobo forma, Kobo Libra, Huawei media Tab, fire HD10, PW3 HDX8.9,	taking the first of your 2 links from #1. book opens ok in sigil, but it crashes ADE 2.0 when i try to move past the 1st page using sigil code view, I see that in 2nd file of book, the body section is empty... maybe that is the issue <body> <div class="body"> </div> </body> trying my own suggestion of calibre to calibre convert... the converted version works in ADE but... looking at the converted file in calibre editor. there is still an empty body section <body class="calibre"> <div class="front"> </div> </body> ... its like I said before, the conversion fixes stuff faster than a manual debug. others may be curious enough to dig deeper though actually , this is more likely- running a check in calibre editor ( after the conversion) if gives 154 errors, nearly all to do with unsafe characters, e.g. The filename OEBPS/@public@vhost@g@gutenberg@html@files@61324@61324-h@61324-h-11.htm_split_001.html contains unsafe characters, that must be escaped, like this OEBPS/%40public%40vhost%40g%40gutenberg%40html%40files%4 061324%4061324-h%4061324-h-11.htm_split_001.html. This can cause problems with some e-book readers. To be absolutely safe, use only the English alphabet [a-z], the numbers [0-9], underscores and hyphens in your file names. While many other characters are allowed, they may cause problems with some software. i have no idea if there is a mechanism to report a problem book to PG Last edited by stumped; 03-25-2020 at 07:00 AM.

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