[Marok]

Hi, I have a large Calibre library (around 21,000 books) which has just refused to open.
I get a 'Calibre library appears to be corrupted' message with an offer to rebuild. This also happened a couple of months back and choosing the rebuild option didn't work. Can someone please tell me of a fix for this?
Many thanks in advance.


The full error message is:-

Traceback (most recent call last):
File "site-packages\calibre\gui2\main.py", line 240, in initialize_db
File "site-packages\calibre\library\database2.py", line 197, in __init__
File "site-packages\calibre\library\database2.py", line 522, in initialize_dynamic
File "site-packages\calibre\library\caches.py", line 1008, in refresh
File "site-packages\calibre\library\sqlite.py", line 315, in run
DatabaseException: unknown string format
RemoteTraceback (most recent call last):
File "site-packages\calibre\library\sqlite.py", line 272, in run
File "site-packages\calibre\library\sqlite.py", line 172, in get
File "site-packages\calibre\library\sqlite.py", line 40, in _c_convert_timestamp
File "site-packages\calibre\utils\date.py", line 80, in parse_date
File "site-packages\python_dateutil-1.5-py2.7.egg\dateutil\parser.py", line 697, in parse
File "site-packages\python_dateutil-1.5-py2.7.egg\dateutil\parser.py", line 303, in parse
ValueError: unknown string format