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Old 05-31-2012, 01:32 PM   #1
kanyiva
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Question Issue with "Error: Unhandled exception"

Good day. I keep running into the error message below when I try to open select books in Calibre. I would appreciate any help. Thanks.

calibre, version 0.8.54
ERROR: Unhandled exception: <b>UnboundLocalError</b>:local variable 'i' referenced before assignment

Traceback (most recent call last):
File "site-packages/calibre/gui2/viewer/main.py", line 848, in load_ebook
File "site-packages/calibre/gui2/viewer/toc.py", line 153, in __init__
File "site-packages/calibre/gui2/viewer/toc.py", line 72, in __init__
UnboundLocalError: local variable 'i' referenced before assignment
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Old 05-31-2012, 02:18 PM   #2
kovidgoyal
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That's a weird error, the only way I can think of it happening is if the spine of the book is empty. Can you open a bug report and attach one of these files. I can at least fix the viewer to handle this case more gracefully.
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Old 06-01-2012, 11:36 PM   #3
kanyiva
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Thank you for your prompt response. I have gone ahead and submitted a bug report. Thanks again.
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Old 06-03-2012, 09:51 PM   #4
Mi3ke
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Hi I too seem to have this error:
calibre, version 0.8.49
ERROR: Unhandled exception: <b>CriticalError</b>:Failed to launch worker process:
Traceback (most recent call last):
File "site-packages\calibre\utils\ipc\server.py", line 149, in do_launch
File "multiprocessing\connection.py", line 121, in accept
File "multiprocessing\connection.py", line 368, in deliver_challenge
File "site.py", line 66, in load_module
ZipImportError: can't find module hmac


Traceback (most recent call last):
File "site-packages\calibre\gui2\actions\view.py", line 201, in view_triggered
File "site-packages\calibre\gui2\actions\view.py", line 269, in _view_books
File "site-packages\calibre\gui2\actions\view.py", line 236, in _view_calibre_books
File "site-packages\calibre\gui2\actions\view.py", line 101, in view_format_by_id
File "site-packages\calibre\gui2\actions\view.py", line 132, in _view_file
File "site-packages\calibre\gui2\actions\view.py", line 120, in _launch_viewer
File "site-packages\calibre\gui2\jobs.py", line 249, in launch_gui_app
File "site-packages\calibre\utils\ipc\server.py", line 166, in run_job
File "site-packages\calibre\utils\ipc\server.py", line 139, in launch_worker
CriticalError: Failed to launch worker process:
Traceback (most recent call last):
File "site-packages\calibre\utils\ipc\server.py", line 149, in do_launch
File "multiprocessing\connection.py", line 121, in accept
File "multiprocessing\connection.py", line 368, in deliver_challenge
File "site.py", line 66, in load_module
ZipImportError: can't find module hmac

I'm brand new to this site and its forums. I also placed a similar question on the "Comments, Questions" thread.

Where do I go to start a bug report?
Thanks very much.
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Old 06-03-2012, 10:09 PM   #5
Mi3ke
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It seems you get that error if you've downloaded the latest update, told it to go ahead and do its thing, But have not *actually* restarted the computer to seal the deal.
My books now seem to be opening as before. Sorry for the hoorah !
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