Conversion error [PDF >> MOBI]

[OMEN]

Firstly,
THANK YOU, this an amazing piece of software.


Secondly,
While converting PDFs to MOBI, 90% of the time I get this error.

ERROR: Conversion Error: <b>Failed</b>: Convert book 1 of 1 (Phishing Exposed (Syngress, 2005))

Convert book 1 of 1 (Phishing Exposed (Syngress, 2005))
Resolved conversion options
calibre version: 0.7.20
{'asciiize': False,
 'author_sort': None,
 'authors': None,
 'base_font_size': 0.0,
 'book_producer': None,
 'change_justification': u'original',
 'chapter': u"//*[((name()='h1' or name()='h2') and re:test(., 'chapter|book|section|part|prologue|epilogue\\s+', 'i')) or @class = 'chapter']",
 'chapter_mark': u'pagebreak',
 'comments': None,
 'cover': None,
 'debug_pipeline': None,
 'disable_font_rescaling': False,
 'dont_compress': False,
 'extra_css': None,
 '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>)',
 'html_unwrap_factor': 0.40000000000000002,
 'input_encoding': None,
 'input_profile': <calibre.customize.profiles.InputProfile object at 0x046DC090>,
 'insert_blank_line': False,
 'insert_metadata': False,
 'isbn': None,
 'keep_ligatures': False,
 'language': None,
 'level1_toc': None,
 'level2_toc': None,
 'level3_toc': None,
 'line_height': 0.0,
 'linearize_tables': True,
 'margin_bottom': 5.0,
 'margin_left': 5.0,
 'margin_right': 5.0,
 'margin_top': 5.0,
 'max_toc_links': 50,
 'new_pdf_engine': False,
 'no_chapters_in_toc': False,
 'no_images': False,
 'no_inline_navbars': True,
 'no_inline_toc': False,
 'output_profile': <calibre.customize.profiles.KindleOutput object at 0x046DC370>,
 'page_breaks_before': u"//*[name()='h1' or name()='h2']",
 'personal_doc': u'[PDOC]',
 'prefer_author_sort': False,
 'prefer_metadata_cover': False,
 'preprocess_html': False,
 'pretty_print': False,
 'pubdate': None,
 'publisher': None,
 'rating': None,
 'read_metadata_from_opf': 'd:\\temp\\calibre_0.7.20_tmp_hqrued\\calibre_0.7.20_k3np7v.opf',
 'remove_first_image': False,
 'remove_footer': True,
 'remove_header': True,
 'remove_paragraph_spacing': True,
 'remove_paragraph_spacing_indent_size': 1.5,
 'rescale_images': False,
 'series': None,
 'series_index': None,
 'smarten_punctuation': False,
 'tags': None,
 'timestamp': None,
 'title': None,
 'title_sort': None,
 'toc_filter': None,
 'toc_threshold': 6,
 'toc_title': None,
 'unwrap_factor': 0.45000000000000001,
 'use_auto_toc': True,
 'verbose': 2}
InputFormatPlugin: PDF Input running
on E:\users\OMEN\Documents\BOOKS\calibre\Unknown\Phishing Exposed (Syngress, 2005) (43)\Phishing Exposed (Syngress, 2005) - Unknown.pdf
Converting file to html...
pdftohtml log:

Retrieving document metadata...
Generating manifest...
Rendering manifest...
Parsing all content...
Parsing index.html ...
Failed to parse content in index.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 1060, in fget
  File "site-packages\calibre\ebooks\oeb\base.py", line 789, in _parse_xhtml
  File "site-packages\calibre\ebooks\conversion\preprocess.py", line 431, in __call__
  File "site-packages\calibre\ebooks\conversion\preprocess.py", line 152, in __call__
  File "site-packages\calibre\ebooks\conversion\preprocess.py", line 133, in dehyphenate
  File "re.py", line 190, in compile
  File "re.py", line 245, in _compile
error: unbalanced parenthesis

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 841, in run
  File "site-packages\calibre\ebooks\conversion\plumber.py", line 968, in create_oebbook
  File "site-packages\calibre\ebooks\oeb\reader.py", line 72, in __call__
  File "site-packages\calibre\ebooks\oeb\reader.py", line 594, 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

AFAIK >> this bug >> http://bugs.calibre-ebook.com/ticket/6975

Windows 7 Pro,
Calibre 0.7.20

[OMEN]

ok, i have downgraded to 0.7.19 and conversion works, the formatting is slightly messy but it works.

[ldolse]

0.7.19 and 0.7.20 will be about the same level of messy. The only difference with pdf conversion in 0.7.20 is that it takes each hyphenated word and does a simple analysis. If the word exists in the document without a hyphen then the hyphen is removed. If it can't find a match with a hyphen then the hyphen is retained.

0.7.19 always retains the hyphens, but otherwise formatting should be identical.

The bug is that currently the search for versions of the word without hyphens can match special characters which cause that failure.

[OMEN]

hmm, so is this a regex syntax problem ?