[alhscw]

I just cleaned up some content in HTML, re-zipped the file, replacing the existing one in my library, and now when I click "convert" using 0.7.12 I get the following error:

ERROR: ERROR: Unhandled exception: <b>ValueError</b>:No plugin to handle input format: zip

Traceback (most recent call last):
File "site-packages\calibre\gui2\actions.py", line 1116, in convert_ebook
File "site-packages\calibre\gui2\tools.py", line 39, in convert_single_ebook
File "site-packages\calibre\gui2\convert\single.py", line 124, in __init__
File "site-packages\calibre\gui2\convert\single.py", line 163, in setup_pipeline
File "site-packages\calibre\ebooks\conversion\plumber.py", line 522, in __init__
ValueError: No plugin to handle input format: zip