epub to mobi problems "No valid entries in the spine of this EPUB"

[TheFatMan]

I'm having problems moving an epub file to my new kindle keyboard. I've used calibre to move other epubs to my kindle but I've had trouble with this one and a few others.

It's a copy of the Pathfinder Advanced Player's Guide I made on ePub Bud.

These are the job details:
Convert book 1 of 1 (PC 02 - Advanced Player's Guide)
Resolved conversion options

Spoiler:

calibre version: 1.2.0
{'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\\s+', 'i')) or @class = 'chapter']",
'chapter_mark': u'pagebreak',
'comments': None,
'cover': u'C:\\Users\\Matthew\\AppData\\Local\\Temp\\calibr e_odo3dy\\khpxdt.jpeg',
'debug_pipeline': None,
'dehyphenate': True,
'delete_blank_paragraphs': True,
'disable_font_rescaling': False,
'dont_compress': False,
'duplicate_links_in_toc': False,
'embed_all_fonts': False,
'embed_font_family': None,
'enable_heuristics': False,
'extra_css': None,
'extract_to': None,
'filter_css': u'',
'fix_indents': True,
'font_size_mapping': None,
'format_scene_breaks': True,
'html_unwrap_factor': 0.4,
'input_encoding': None,
'input_profile': <calibre.customize.profiles.InputProfile object at 0x03F677F0>,
'insert_blank_line': False,
'insert_blank_line_size': 0.5,
'insert_metadata': False,
'isbn': None,
'italicize_common_cases': True,
'keep_ligatures': False,
'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,
'markup_chapter_headings': True,
'max_toc_links': 50,
'minimum_line_height': 120.0,
'mobi_file_type': u'old',
'mobi_ignore_margins': False,
'mobi_keep_original_images': False,
'mobi_toc_at_start': False,
'no_chapters_in_toc': False,
'no_inline_navbars': False,
'no_inline_toc': False,
'output_profile': <calibre.customize.profiles.OutputProfile object at 0x03F679D0>,
'page_breaks_before': u'/',
'personal_doc': u'[PDOC]',
'prefer_author_sort': False,
'prefer_metadata_cover': False,
'pretty_print': False,
'pubdate': None,
'publisher': None,
'rating': None,
'read_metadata_from_opf': u'C:\\Users\\Matthew\\AppData\\Local\\Temp\\calibr e_odo3dy\\0jnsg5.opf',
'remove_fake_margins': True,
'remove_first_image': False,
'remove_paragraph_spacing': False,
'remove_paragraph_spacing_indent_size': 1.5,
'renumber_headings': True,
'replace_scene_breaks': u'',
'search_replace': '[]',
'series': None,
'series_index': None,
'share_not_sync': False,
'smarten_punctuation': False,
'sr1_replace': None,
'sr1_search': None,
'sr2_replace': None,
'sr2_search': None,
'sr3_replace': None,
'sr3_search': None,
'start_reading_at': None,
'subset_embedded_fonts': False,
'tags': None,
'timestamp': None,
'title': None,
'title_sort': None,
'toc_filter': None,
'toc_threshold': 6,
'toc_title': None,
'unsmarten_punctuation': False,
'unwrap_lines': True,
'use_auto_toc': False,
'verbose': 2}
InputFormatPlugin: EPUB Input running
on C:\Users\Matthew\AppData\Local\Temp\calibre_odo3dy \3q6xvh.epub
Python function terminated unexpectedly
No valid entries in the spine of this EPUB (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 189, in main
File "site-packages\calibre\gui2\convert\gui_conversion.py", line 31, in gui_convert_override
File "site-packages\calibre\gui2\convert\gui_conversion.py", line 25, in gui_convert
File "site-packages\calibre\ebooks\conversion\plumber.py", line 1027, in run
File "site-packages\calibre\customize\conversion.py", line 241, in __call__
File "site-packages\calibre\ebooks\conversion\plugins\epub_in put.py", line 245, in convert
ValueError: No valid entries in the spine of this EPUB

I've looked around for a solution to this problem, but I don't really know anything about html coding, so i can't make heads or tails of the solutions I've found. Any help would be very much appreciated.

[DoctorOhh]

Originally Posted by TheFatMan

I'm having problems moving an epub file to my new kindle keyboard. I've used calibre to move other epubs to my kindle but I've had trouble with this one and a few others.
...~~~...
I've looked around for a solution to this problem, but I don't really know anything about html coding, so i can't make heads or tails of the solutions I've found. Any help would be very much appreciated.

I opened your book up in Sigil and it said your book contained errors, specifically "The OPF file does not contain a valid spine. Sigil has created a new one for you."

Sigil (ePub editing software) is the forum below calibre you might want to investigate trying out this Open source software.