Sometimes when searching my whole library (I do that occasionally while AFKing) I get an error for some libraries: Search HADC for all by kim newman: Cannot perform search due to sign in failure
Really:
Code:
Initialize HADC: : Server response error (Sign in failed. Check card number and PIN.)
Traceback (most recent call last):
File "calibre_plugins.overdrive_link.jobs", line 1071, in init_and_sign_in
File "calibre_plugins.overdrive_link.overdrive", line 341, in sign_in
LibraryError: u'Sign in failed. Check card number and PIN.'
But it is the right info.

It usually happens sporadically with >100 searches queued.
Perhaps something could be done to improve login? Or fallback on logged-out searching.