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JVarga · 10-12-2019, 11:19 AM

This is a rather old thread, but I hope somebody is still reading it...
I keep failing to extract the ISBN from PDF files (all PDF-s) with the error message:

Traceback (most recent call last):
File "site-packages\calibre\utils\ipc\simple_worker.py", line 290, in main
File "calibre_plugins.extract_isbn.pdf", line 86, in get_isbn
UnboundLocalError: local variable 'scanner' referenced before assignment

It is quite an old error; at present, I use Calibre 4.1.0 under Windows 10.

Can anybody help how to solve or bypass the problem?

10-12-2019, 11:19 AM	#345
JVarga Junior Member Posts: 2 Karma: 10 Join Date: Oct 2019 Device: none	Extract ISBN does not work under Windows 10 This is a rather old thread, but I hope somebody is still reading it... I keep failing to extract the ISBN from PDF files (all PDF-s) with the error message: Traceback (most recent call last): File "site-packages\calibre\utils\ipc\simple_worker.py", line 290, in main File "calibre_plugins.extract_isbn.pdf", line 86, in get_isbn UnboundLocalError: local variable 'scanner' referenced before assignment It is quite an old error; at present, I use Calibre 4.1.0 under Windows 10. Can anybody help how to solve or bypass the problem?