MobileRead Forums - View Single Post - Help with error: TypeError: cannot concatenate 'str' and 'int' objects

Talayero · 01-24-2013, 06:02 PM

Thank you for answering.
Now, after rebuilding the books.db, recreating manually all the collections and adding several books, all seemed OK, but then, suddenly, I got a new error and calibre can't communicate with the device:

Cannot concatenate 'str' and 'NoneType' objects

Traceback (most recent call last):
File "site-packages\calibre\gui2\device.py", line 85, in run
File "site-packages\calibre\gui2\device.py", line 470, in _books
File "site-packages\calibre\devices\prst1\driver.py", line 197, in books
TypeError: cannot concatenate 'str' and 'NoneType' objects

That's a nightmare.
Can I fix that now without deleting again the books.db?

I think I should look for a different way to manage my collections... But that's a pity, because Calibre is the best, if I could fix these weird problems.

01-24-2013, 06:02 PM	#3
Talayero Member Posts: 21 Karma: 10 Join Date: Apr 2012 Location: Spain Device: Likebook Mars E Reader	Thank you for answering. Now, after rebuilding the books.db, recreating manually all the collections and adding several books, all seemed OK, but then, suddenly, I got a new error and calibre can't communicate with the device: Cannot concatenate 'str' and 'NoneType' objects Traceback (most recent call last): File "site-packages\calibre\gui2\device.py", line 85, in run File "site-packages\calibre\gui2\device.py", line 470, in _books File "site-packages\calibre\devices\prst1\driver.py", line 197, in books TypeError: cannot concatenate 'str' and 'NoneType' objects That's a nightmare. Can I fix that now without deleting again the books.db? I think I should look for a different way to manage my collections... But that's a pity, because Calibre is the best, if I could fix these weird problems.