Conversion issues

[primetime34]

Trying to convert a book and I get this error...any idea what it means and how to fix it?
ERROR: Conversion Error: <b>Failed</b>: Convert book 1 of 1 (Abraham in Egypt)

Convert book 1 of 1 (Abraham in Egypt)
Resolved conversion options
{'asciiize': False,
'author_sort': None,
'authors': None,
'base_font_size': 0.0,
'book_producer': None,
'chapter': u"//*[((name()='h1' or name()='h2') and re:test(., 'chapter|book|section|part\\s+', 'i')) or @class = 'chapter']",
'chapter_mark': u'pagebreak',
'comments': None,
'cover': 'c:\\docume~1\\ryan.dad\\locals~1\\temp\\calibre_0 .6.41_jt6dyu.jpeg',
'debug_pipeline': None,
'disable_font_rescaling': False,
'dont_justify': False,
'dont_split_on_page_breaks': False,
'extra_css': None,
'extract_to': None,
'flow_size': 1320,
'font_size_mapping': None,
'footer_regex': u'(?i)(?<=<hr>)((\\s*<a name=\\d+></a>((<img.+?>)*<br>\\s*)?\\d+<br>\\s*.*?\\s*)|(\\s* <a name=\\d+></a>((<img.+?>)*<br>\\s*)?.*?<br>\\s*\\d+))(?=<br>)' ,
'header_regex': u'(?i)(?<=<hr>)((\\s*<a name=\\d+></a>((<img.+?>)*<br>\\s*)?\\d+<br>\\s*.*?\\s*)|(\\s* <a name=\\d+></a>((<img.+?>)*<br>\\s*)?.*?<br>\\s*\\d+))(?=<br>)' ,
'input_encoding': None,
'input_profile': <calibre.customize.profiles.InputProfile object at 0x02A9A490>,
'insert_blank_line': False,
'insert_metadata': False,
'isbn': None,
'language': None,
'level1_toc': None,
'level2_toc': None,
'level3_toc': None,
'line_height': 0.0,
'linearize_tables': False,
'margin_bottom': 5.0,
'margin_left': 5.0,
'margin_right': 5.0,
'margin_top': 5.0,
'max_toc_links': 50,
'no_chapters_in_toc': False,
'no_default_epub_cover': False,
'no_inline_navbars': False,
'output_profile': <calibre.customize.profiles.NookOutput object at 0x02A9A850>,
'page_breaks_before': u'/',
'prefer_metadata_cover': False,
'preprocess_html': False,
'pretty_print': True,
'pubdate': None,
'publisher': None,
'rating': None,
'read_metadata_from_opf': 'c:\\docume~1\\ryan.dad\\locals~1\\temp\\calibre_0 .6.41_tbstpo.opf',
'remove_first_image': False,
'remove_footer': False,
'remove_header': False,
'remove_paragraph_spacing': True,
'remove_paragraph_spacing_indent_size': 1.5,
'series': None,
'series_index': None,
'tags': None,
'timestamp': None,
'title': None,
'title_sort': None,
'toc_filter': None,
'toc_threshold': 6,
'use_auto_toc': False,
'verbose': 2}
InputFormatPlugin: MOBI Input running
on C:\Documents and Settings\Ryan.DAD\My Documents\eBooks\Hugh Nibley\Abraham in Egypt (632)\Abraham in Egypt - Hugh Nibley.prc
Extracting text...
Adding anchors...
Extracting images...
Cleaning up HTML...
Parsing HTML...
Converting style information to CSS...
Creating OPF...
Parsing all content...
Parsing styles.css ...
Parsing Abraham_in_Egypt.html ...
Initial parse failed:
Traceback (most recent call last):
File "site-packages\calibre\ebooks\oeb\base.py", line 814, in first_pass
File "lxml.etree.pyx", line 2538, in lxml.etree.fromstring (src/lxml/lxml.etree.c:48266)
File "parser.pxi", line 1536, in lxml.etree._parseMemoryDocument (src/lxml/lxml.etree.c:71653)
File "parser.pxi", line 1408, in lxml.etree._parseDoc (src/lxml/lxml.etree.c:70449)
File "parser.pxi", line 898, in lxml.etree._BaseParser._parseUnicodeDoc (src/lxml/lxml.etree.c:67144)
File "parser.pxi", line 539, in lxml.etree._ParserContext._handleParseResultDoc (src/lxml/lxml.etree.c:63820)
File "parser.pxi", line 625, in lxml.etree._handleParseResult (src/lxml/lxml.etree.c:64741)
File "parser.pxi", line 565, in lxml.etree._raiseParseError (src/lxml/lxml.etree.c:64084)
XMLSyntaxError: Failed to parse QName 'fo:', line 494, column 8

Parsing file 'Abraham_in_Egypt.html' as HTML
Forcing Abraham_in_Egypt.html into XHTML namespace
Stripping comments and meta tags from Abraham_in_Egypt.html
Failed to parse content in Abraham_in_Egypt.html
Traceback (most recent call last):
File "site-packages\calibre\ebooks\oeb\reader.py", line 159, in _manifest_prune_invalid
File "site-packages\calibre\ebooks\oeb\base.py", line 1033, in fget
File "site-packages\calibre\ebooks\oeb\base.py", line 884, in _parse_xhtml
File "lxml.etree.pyx", line 2538, in lxml.etree.fromstring (src/lxml/lxml.etree.c:48266)
File "parser.pxi", line 1536, in lxml.etree._parseMemoryDocument (src/lxml/lxml.etree.c:71653)
File "parser.pxi", line 1408, in lxml.etree._parseDoc (src/lxml/lxml.etree.c:70449)
File "parser.pxi", line 898, in lxml.etree._BaseParser._parseUnicodeDoc (src/lxml/lxml.etree.c:67144)
File "parser.pxi", line 539, in lxml.etree._ParserContext._handleParseResultDoc (src/lxml/lxml.etree.c:63820)
File "parser.pxi", line 625, in lxml.etree._handleParseResult (src/lxml/lxml.etree.c:64741)
File "parser.pxi", line 565, in lxml.etree._raiseParseError (src/lxml/lxml.etree.c:64084)
XMLSyntaxError: Failed to parse QName 'fo:', line 491, column 8

Spine item 'id1' not found
Python function terminated unexpectedly
Spine is empty (Error Code: 1)
Traceback (most recent call last):
File "site.py", line 103, in main
File "site.py", line 85, in run_entry_point
File "site-packages\calibre\utils\ipc\worker.py", line 99, in main
File "site-packages\calibre\gui2\convert\gui_conversion.py", line 24, in gui_convert
File "site-packages\calibre\ebooks\conversion\plumber.py", line 787, in run
File "site-packages\calibre\ebooks\conversion\plumber.py", line 910, in create_oebbook
File "site-packages\calibre\ebooks\oeb\reader.py", line 72, in __call__
File "site-packages\calibre\ebooks\oeb\reader.py", line 589, in _all_from_opf
File "site-packages\calibre\ebooks\oeb\reader.py", line 289, in _spine_from_opf
calibre.ebooks.oeb.base.OEBError: Spine is empty"



Thanks

[kovidgoyal]

Open a ticket and attach the file.