Downgraded from 4.23 to 3.48-can't delete books - Page 2

Ellie · 01-12-2021, 04:51 PM

Quote:

Originally Posted by ownedbycats

Unfortunately, you can't share a library between 5.x and older versions without the errors occuring. In this case, it might be for the best to stick with your portable version, or use a separate library for your device books.

I think you're right. I don't want to really mess things up and the only thing that doesn't work is deleting books which I can do through Calibre portable. Thanks for all of your help.

JSWolf · 01-12-2021, 05:21 PM

Quote:

Originally Posted by Ellie

No, I have Win7 so the latest one I had on there was v4.23. And I only kept updating because I need it to manage my Kobo library and when they update their firmware I have to update Calibre to do that. But all versions starting with Calibre 4 were crashing my device drivers off and on. I checked and they're the latest drivers so updating them wasn't an option. I have now found out that I can use Calibre v5 portable and it will manage my Kobo library so I was able to downgrade back to a version that worked better with Win7.
Ellie

You can install Calibre 4.23. You can use it with the latest Kobo firmware. If you come to Mobileread when a new firmware version is released, you will be able to find the thread about it and you will be able to find out if it's compatible with 4.23.

Also, Calibre 4.23 is compatible with your existing database. Put back 4.23 and your database problems will go away.

ownedbycats · 01-12-2021, 05:48 PM

JSWolf:

Quote:

Originally Posted by Ellie

But all versions starting with Calibre 4 were crashing my device drivers off and on. I checked and they're the latest drivers so updating them wasn't an option.

I believe there's an environmental variable to disable hardware acceleration, which may help (though it may also break things worse). I don't remember what it is though.

gbm · 01-12-2021, 07:20 PM

Quote:

Originally Posted by Ellie

I just tried that and although it switched, it showed no books in the library inside of Calibre.

Quote:

Originally Posted by ownedbycats

Yes, you'll need to copy the books from My Library to My New Library. It only copies structure so that no data from custom columns is lost during that.

To copy from your old library to the new one just open the old library high light a book then do a ctrl a to select all then do a right click and chose "copy to library" select the new library.

bernie

gbm · 01-12-2021, 07:21 PM

Quote:

Originally Posted by ownedbycats

I believe there's an environmental variable to disable hardware acceleration, which may help (though it may also break things worse). I don't remember what it is though.

https://doc.qt.io/qt-5/qtwebengine-debugging.html

bernie

melba12 · 10-07-2021, 04:11 AM

I hope you have by now resolved, but reading this 3d I've devised my own way and did it, so I report here, cause I had the same issue with Calibre 4.2.0 (downgraded from 5)
1 create an empty new library by copying the structure to and putting it in a different file from the original one
2 select all your books and copy them all into the new library
3 switch to the new empty library and, most important, close Calibre
4 reopen Calibre and you will find that you can delete all you need
5 now you can delete the old library and also all the files and the db contained in the old position

For me it at worked spendidly!

theducks · 10-07-2021, 09:13 AM

@Melba12

Users should not EVER copy book contents of one Library to another using the OS. (we call this 'messing under the skirts') Calibre (app) must make all changes to keep the DB in sync with the files stored. Very bad things can happen when this goes sideways.

The one exception: If you copy the ENTIRE contents of the OLD Library folder, to a NEW EMPTY folder .

To Move / Copy specific contents (selected books), use the builtin Copy to Library menu item. That even brings the Library version of the Metadata across.

10-07-2021, 04:11 AM	#21
melba12 Junior Member Posts: 1 Karma: 10 Join Date: Oct 2021 Device: Kobo Clara HD 6	Resolved in Calibre 4.2.0 I hope you have by now resolved, but reading this 3d I've devised my own way and did it, so I report here, cause I had the same issue with Calibre 4.2.0 (downgraded from 5) 1 create an empty new library by copying the structure to and putting it in a different file from the original one 2 select all your books and copy them all into the new library 3 switch to the new empty library and, most important, close Calibre 4 reopen Calibre and you will find that you can delete all you need 5 now you can delete the old library and also all the files and the db contained in the old position For me it at worked spendidly!

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Windows 10 Pro got downgraded to Home after reinstalling the OS	RodrigoFernando	Windows Devices	3	12-19-2019 11:18 AM
PW3 Downgraded from 5.8.11 to 5.7.4 - YMMV and some questions	insaneshan3	Kindle Developer's Corner	1	10-01-2018 02:47 AM
Success! Downgraded firmware from 5.6.1.1	madagascaradam	Kindle Developer's Corner	26	02-23-2016 07:01 PM
Downgraded KPW1 software, lost collections	wildflowertx	Amazon Kindle	6	07-21-2014 01:20 AM
my story has been frozen ever since i downgraded it	haianh0402	iRiver Story	11	08-09-2010 03:25 AM

10-07-2021, 09:13 AM	#22
theducks Well trained by Cats Posts: 31,076 Karma: 60358908 Join Date: Aug 2009 Location: The Central Coast of California Device: Kobo Libra2,Kobo Aura2v1, K4NT(Fixed: New Bat.), Galaxy Tab A	@Melba12 Users should not EVER copy book contents of one Library to another using the OS. (we call this 'messing under the skirts') Calibre (app) must make all changes to keep the DB in sync with the files stored. Very bad things can happen when this goes sideways. The one exception: If you copy the ENTIRE contents of the OLD Library folder, to a NEW EMPTY folder . To Move / Copy specific contents (selected books), use the builtin Copy to Library menu item. That even brings the Library version of the Metadata across.

Advert

Advert