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Old 11-12-2019, 10:01 PM   #1
grr50
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Calibre version compatibility
I am currently creating the Calibre database on a Windows 10 machine with the 3.38 version. The database is copied to a Windows XP machine running Calibre 1.48. The database is also used on an other Windows 10 machine using a different Calibre version. Currently, all users can transfer the documents to there respective ereaders that are Sony PRS-T1 or T3 units.

A new ereader has been added, a Kobo Forma unit, and I seem to understand that I should upgrade to version 4.18 to be compatible to the Kobo unit and convert all epub books to the Kepub format.

My question is:
- Will the upgrade to version 4.18 on the maintenance PC change the ability of the other users, with older versions, to use the database?
- Do I need to convert epub books to the kepub format to have the Kobo Forma be able to read the books?
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Old 11-12-2019, 10:37 PM   #2
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there are not compatibility issues between 3.x and 4.x with respect to sharing the library.
Last edited by kovidgoyal; 11-12-2019 at 11:56 PM.
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Old 11-12-2019, 11:18 PM   #3
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Quote:
Originally Posted by grr50 View Post
- Do I need to convert epub books to the kepub format to have the Kobo Forma be able to read the books?
No. Kobo can read epubs just fine. There are some features only available for kepub, though. Reading stats and image zooming, for example.
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Old 11-13-2019, 06:01 AM   #4
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grr50, what version Forma firmware are you using? I think it would be a good idea to update to 4.18.
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Old 11-13-2019, 07:50 AM   #5
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Quote:
Originally Posted by grr50 View Post
I am currently creating the Calibre database on a Windows 10 machine with the 3.38 version. The database is copied to a Windows XP machine running Calibre 1.48. The database is also used on an other Windows 10 machine using a different Calibre version. Currently, all users can transfer the documents to there respective ereaders that are Sony PRS-T1 or T3 units.

A new ereader has been added, a Kobo Forma unit, and I seem to understand that I should upgrade to version 4.18 to be compatible to the Kobo unit and convert all epub books to the Kepub format.

My question is:
- Will the upgrade to version 4.18 on the maintenance PC change the ability of the other users, with older versions, to use the database?
- Do I need to convert epub books to the kepub format to have the Kobo Forma be able to read the books?
I think you have some version number confusion. There hasn't been a calibre 4.18 released yet. That is about 15 releases away. But, 4.18 is the current Kobo firmware version. Is that what you mean? If so, calibre supports it as of version 4.1. But, it is safe to use the "Attempt to support newer firmware" option in the driver with earlier versions of calibre. You won't be able to use the Forma with the calibre version 1.48 installation. There are changes in the database on Kobo devices that are not backwardly compatible to that version of calibre.
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Old 11-13-2019, 10:38 AM   #6
grr50
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Sorry for the Calibre version errors, versions used are 1.48, 3.35 and 3.38.1. Calibre recommendation is to update to 4.3.0.
I do not have the Forma firmware version yet, it is probably the newest since it was received yesterday.
Will Calibre be able to be used with the Kobo Forma if I upgrade Calibre to version 4.3.0?
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Old 11-13-2019, 10:43 AM   #7
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Sorry, I should have made a specific post for the Kobo.
The question is really, by upgrading Calibre version to 4.3.0, the other computers that have versions 1.48 and 3.35 will be able to read the database?
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Old 11-13-2019, 11:48 AM   #8
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Quote:
Originally Posted by grr50 View Post
Sorry, I should have made a specific post for the Kobo.
The question is really, by upgrading Calibre version to 4.3.0, the other computers that have versions 1.48 and 3.35 will be able to read the database?
Whose database? Calibre YES! Kobo : (but I think that is limited ti extended utilities, not the basics) most likely NO
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Old 11-13-2019, 06:49 PM   #9
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Quote:
Originally Posted by grr50 View Post
Sorry for the Calibre version errors, versions used are 1.48, 3.35 and 3.38.1. Calibre recommendation is to update to 4.3.0.
I do not have the Forma firmware version yet, it is probably the newest since it was received yesterday.
Will Calibre be able to be used with the Kobo Forma if I upgrade Calibre to version 4.3.0?
I've already answered that. But...

For calibre to use the Kobo Forma, you need at least calibre 3.33.1. Earlier versions of calibre will not see the Forma at all.

If the device has Kobo firmware 4.18.x, then you either need to upgrade to at least 4.1, or turn on the "Attempt to support newer firmware" option in the driver. It is safe to do this if you do not want to update calibre.
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