[country0129]

I'd successfully generated a catalog once before. Since, I have added several volumns, and I wanted to generate a new one. I keep getting an error message, saying the process had ended. I restarted in Debug mode, and following is the text of the file generated:

calibre Debug log
calibre 0.9.16 [64bit] isfrozen: True is64bit: True
Windows-7-6.1.7601-SP1 Windows ('64bit', 'WindowsPE')
('Windows', '7', '6.1.7601')
Python 2.7.3
Windows: ('7', '6.1.7601', 'SP1', 'Multiprocessor Free')
Starting up...
Started up in 101.76 seconds with 11486 books
Worker Launch took: 0.230000019073
Job: 1 Generate catalog finished
Generate catalog
Sections: Authors, Titles
Catalog_EPUB_MOBI('Calibre Library'): Generating mobi for kindle in GUI environment, locale: 'English'
connected_device: 'None'
book count: 11486
opts:
author_clip: 60
catalog_title: u'My Books'
connected_kindle: False
creator: u'Saturday, January 26, 2013'
cross_reference_authors: True
description_clip: 100
exclude_genre: u'\\[.+\\]|^\\+$'
exclusion_rules: ()
fmt: u'mobi'
genre_source_field: u'Tags'
header_note_source_field: ''
merge_comments_rule: u'#kindle:after:True'
output_profile: 'kindle'
prefix_rules: ()
search_text: None
sort_by: None
sort_descriptions_by_author: True
sync: False
thumb_width: u'1.00'
use_existing_cover: False
Custom fields:
#formats 'Formats' composite
#kindle 'Kindle' text
Python function terminated unexpectedly
coercing to Unicode: need string or buffer, dict found (Error Code: 1)
Traceback (most recent call last):
File "site.py", line 132, in main
File "site.py", line 109, in run_entry_point
File "site-packages\calibre\utils\ipc\worker.py", line 186, in main
File "site-packages\calibre\gui2\convert\gui_conversion.py", line 68, in gui_catalog
File "site-packages\calibre\library\catalogs\epub_mobi.py", line 349, in run
File "site-packages\calibre\library\catalogs\epub_mobi_builde r.py", line 160, in __init__
File "site-packages\calibre\library\catalogs\epub_mobi_builde r.py", line 1047, in fetch_books_to_catalog
File "site-packages\calibre\library\catalogs\epub_mobi_builde r.py", line 906, in _populate_title
File "site-packages\calibre\library\catalogs\epub_mobi_builde r.py", line 453, in convert_html_entities
TypeError: coercing to Unicode: need string or buffer, dict found

Can someone tell me what to do to fix it?

Thanks