[FileType Plugin] ACSM input plugin

[dearleuk]

Originally Posted by JSWolf

You can return the the book. Go to the library's Overdrive site and then to My account > loans and return it from there.

Unfortunately not, when I try that I get an error message:-

You have opened this title outside BorrowBox, for example in Adobe Digital Editions. It can only be returned there.

[JSWolf]

Originally Posted by dearleuk

Unfortunately not, when I try that I get an error message:-

You have opened this title outside BorrowBox, for example in Adobe Digital Editions. It can only be returned there.

Google’s AI gave this answer.

To return BorrowBox eBooks early, navigate to the 'My Loans' section in the app or website, locate the item, and click the 'Return' button, then confirm. This frees up your loan credit immediately. Items also return automatically at the end of the loan period.

[dearleuk]

Thank you, tried that and got the You have opened this title outside BorrowBox, for example in Adobe Digital Editions. It can only be returned there message.

The plugin has been working fine for ages, no problems returning books, don't have any idea why it's started to playup

[JSWolf]

Originally Posted by dearleuk

Thank you, tried that and got the You have opened this title outside BorrowBox, for example in Adobe Digital Editions. It can only be returned there message.

The plugin has been working fine for ages, no problems returning books, don't have any idea why it's started to playup

Have you tried retuning ePub? I just tested returning an ePub and it worked perfectly.

[gbm]

Download this zip from https://github.com/Leseratte10/acsm-calibre-plugin.

https://github.com/Leseratte10/acsm-...ads/master.zip

Unzip it into a new folder I named mine acsm-calibre-plugin-master.

Now double click on bundle_calibre_plugin.sh select run.

You should now have a zip file named calibre-plugin.zip.

Now open calibre and go to Preferences--Plugins.

Now open calibre and go to Preferences--Plugins.

Now click on "load plugin from file"
Now go to the folder acsm-calibre-plugin-master click on
calibre-plugin.zip answer ok then yes then restart calibre.

You will now have the lateness beta acsm plugin with all the new commits

luck
bernie

Originally Posted by dearleuk

Thank you, tried that and got the You have opened this title outside BorrowBox, for example in Adobe Digital Editions. It can only be returned there message.

The plugin has been working fine for ages, no problems returning books, don't have any idea why it's started to playup

[sgmoore]

Originally Posted by dearleuk

ERROR: Unhandled exception: <b>TypeError</b>:unsupported operand type(s) for +: 'NoneType' and 'str'

Does anyone know how I can resolve this please?

See https://github.com/Leseratte10/acsm-...ugin/issues/55

[dearleuk]

Thank you gbm, sgmoore, JSWolf

[DNSB]

For those who might want to try @gbm's suggestion but do not have a Linux box to run the .sh commands on, I've attached the output .zip files to this message. There do not seem to be any changes in the calibre-migration plugin but included it for anyone who might need it.

[dunhill]

Originally Posted by gbm

Download this zip from https://github.com/Leseratte10/acsm-calibre-plugin.

https://github.com/Leseratte10/acsm-...ads/master.zip

Unzip it into a new folder I named mine acsm-calibre-plugin-master.

Now double click on bundle_calibre_plugin.sh select run.

You should now have a zip file named calibre-plugin.zip.

Now open calibre and go to Preferences--Plugins.

Now open calibre and go to Preferences--Plugins.

Now click on "load plugin from file"
Now go to the folder acsm-calibre-plugin-master click on
calibre-plugin.zip answer ok then yes then restart calibre.

You will now have the lateness beta acsm plugin with all the new commits

luck
bernie

Thank you !!

[gbm]

From my testing on 3/8-9/2026 I do not recommend installing the calibre-migration-plugin.zip at this time.

I do highly recommend the calibre-plugin.zip.

bernie

I have been running this version of the plugin for a couple years, I check every 2-3 months to see if a new commit has been made.

Originally Posted by DNSB

For those who might want to try @gbm's suggestion but do not have a Linux box to run the .sh commands on, I've attached the output .zip files to this message. There do not seem to be any changes in the calibre-migration plugin but included it for anyone who might need it.

[ShadwellNH]

Originally Posted by dearleuk

Thank you, tried that and got the You have opened this title outside BorrowBox, for example in Adobe Digital Editions. It can only be returned there message.

If you borrowed it from Calibre via DeACSM, try returning it from Calibre. Unfortunately this option is rather buried (it should be a right-click on the book!). To find it:

Prefrences -> Plugins -> Search for plugin, type "ACSM" -> select DeACSM -> Customize plugin -> Show loaned books -> select your book -> Click the arrow button on the right to return the book

[dearleuk]

Originally Posted by ShadwellNH

If you borrowed it from Calibre via DeACSM, try returning it from Calibre. Unfortunately this option is rather buried (it should be a right-click on the book!). To find it:

Prefrences -> Plugins -> Search for plugin, type "ACSM" -> select DeACSM -> Customize plugin -> Show loaned books -> select your book -> Click the arrow button on the right to return the book

That's how I was trying to return the book and that's where the following error occurs

calibre, version 8.4.0
ERROR: Unhandled exception: <b>TypeError</b>:unsupported operand type(s) for +: 'NoneType' and 'str'

calibre 8.4 embedded-python: True
Linux-6.14.0-37-generic-x86_64-with-glibc2.41 Linux ('64bit', 'ELF')
('Linux', '6.14.0-37-generic', '#37-Ubuntu SMP PREEMPT_DYNAMIC Fri Nov 14 22:10:32 UTC 2025')
Python 3.11.12
Interface language: None
EXE path: /opt/calibre/bin/calibre
Successfully initialized third party plugins: DeACSM (0, 0, 16) && DeDRM (10, 0, 3)
Traceback (most recent call last):
File "calibre_plugins.deacsm.config", line 1298, in show_rented_books
d = RentedBooksDialog(self, self.deacsmprefs["list_of_rented_books"])
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ ^^^^^^^^^^^^^^^
File "calibre_plugins.deacsm.config", line 1321, in __init__
self.populate_list()
File "calibre_plugins.deacsm.config", line 1398, in populate_list
item = QListWidgetItem(book["book_name"] + " " + info)
~~~~~~~~~~~~~~~~~~^~~~~
TypeError: unsupported operand type(s) for +: 'NoneType' and 'str'

[JSWolf]

Originally Posted by dearleuk

That's how I was trying to return the book and that's where the following error occurs

calibre, version 8.4.0
ERROR: Unhandled exception: <b>TypeError</b>:unsupported operand type(s) for +: 'NoneType' and 'str'

calibre 8.4 embedded-python: True
Linux-6.14.0-37-generic-x86_64-with-glibc2.41 Linux ('64bit', 'ELF')
('Linux', '6.14.0-37-generic', '#37-Ubuntu SMP PREEMPT_DYNAMIC Fri Nov 14 22:10:32 UTC 2025')
Python 3.11.12
Interface language: None
EXE path: /opt/calibre/bin/calibre
Successfully initialized third party plugins: DeACSM (0, 0, 16) && DeDRM (10, 0, 3)
Traceback (most recent call last):
File "calibre_plugins.deacsm.config", line 1298, in show_rented_books
d = RentedBooksDialog(self, self.deacsmprefs["list_of_rented_books"])
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ ^^^^^^^^^^^^^^^
File "calibre_plugins.deacsm.config", line 1321, in __init__
self.populate_list()
File "calibre_plugins.deacsm.config", line 1398, in populate_list
item = QListWidgetItem(book["book_name"] + " " + info)
~~~~~~~~~~~~~~~~~~^~~~~
TypeError: unsupported operand type(s) for +: 'NoneType' and 'str'

You should update to calibre 9.x from the official website and try again. I'm using 9.x and I had no trouble returning an ePub. I am on Windows 11. But if your calibre is not downloaded from the official site, that could be a problem.