[aceflor]

I have been a very happy Calibre Portable user on a USb stick with a Surface pro for some time now. I have last week upgraded my Surface to Windows 10, Calibre seemed to work without problems until today. This is the message error I get :

calibre, version 2.45.0
ERROR: Unhandled exception: <b>TypeError</b>:Not a unicode string

calibre 2.45 Portable isfrozen: True is64bit: False
Windows-8-6.2.9200 Windows ('32bit', 'WindowsPE')
32bit process running on 64bit windows
('Windows', '8', '6.2.9200')
Python 2.7.9
Windows: ('8', '6.2.9200', '', 'Multiprocessor Free')
Successfully initialized third party plugins: DeDRM && KoboTouchExtended && Count Pages && EpubMerge && Modify ePub && Overdrive Link && Kobo Utilities && EpubSplit && Kindle Collections && Resize Cover && KindleUnpack - The Plugin && Find Duplicates && Overdrive Link
Traceback (most recent call last):
File "site-packages\calibre\gui2\auto_add.py", line 212, in add_to_db
File "site-packages\calibre\gui2\library\models.py", line 336, in add_books
File "site-packages\calibre\db\legacy.py", line 221, in add_books
File "site-packages\calibre\db\cache.py", line 1544, in add_books
File "site-packages\calibre\db\cache.py", line 57, in call_func_with_lock
File "site-packages\calibre\db\cache.py", line 1492, in create_book_entry
File "site-packages\calibre\db\cache.py", line 1477, in has_book
File "<string>", line 5, in lower
TypeError: Not a unicode string

Then, if I try to search for an author, this is what I get :

calibre 2.45 Portable isfrozen: True is64bit: False
Windows-8-6.2.9200 Windows ('32bit', 'WindowsPE')
32bit process running on 64bit windows
('Windows', '8', '6.2.9200')
Python 2.7.9
Windows: ('8', '6.2.9200', '', 'Multiprocessor Free')
Successfully initialized third party plugins: DeDRM && KoboTouchExtended && Count Pages && EpubMerge && Modify ePub && Overdrive Link && Kobo Utilities && EpubSplit && Kindle Collections && Resize Cover && KindleUnpack - The Plugin && Find Duplicates && Overdrive Link
Traceback (most recent call last):
File "site-packages\calibre\gui2\library\views.py", line 1080, in search_proxy
File "site-packages\calibre\gui2\library\models.py", line 450, in search
File "site-packages\calibre\db\view.py", line 269, in search
File "site-packages\calibre\db\view.py", line 304, in search_getting_ids
File "site-packages\calibre\db\cache.py", line 57, in call_func_with_lock
File "site-packages\calibre\db\cache.py", line 967, in search
File "site-packages\calibre\db\search.py", line 853, in __call__
File "site-packages\calibre\db\search.py", line 895, in _do_search
File "site-packages\calibre\db\search.py", line 475, in parse
File "site-packages\calibre\utils\search_query_parser.py", line 327, in parse
File "site-packages\calibre\utils\search_query_parser.py", line 348, in _parse
File "site-packages\calibre\utils\search_query_parser.py", line 356, in evaluate
File "site-packages\calibre\utils\search_query_parser.py", line 399, in evaluate_token
File "site-packages\calibre\utils\search_query_parser.py", line 403, in _get_matches
File "site-packages\calibre\db\search.py", line 682, in get_matches
File "site-packages\calibre\db\search.py", line 53, in _match
TypeError: 'int' object is not iterable

I tried to upgrade calibre portable to 2.49 with the same results. Dito if I try Calibre x64 with my library on the stick.

What should I try next and is this happening because of Windows 10 or because my library somehow got corrupted ?

I'd be grateful for any suggestion.