Kindle Mobi format will not open in Calibre

[dobbin]

Apologies if this is the wrong place for this post.

I have a Windows 10 PC with Kindle for PC 1.17.0(44170) on.

Previously I have downloaded my books, imported them into Calibre and been able to use them without issue.

Today I have tried the same with a 40Mb file and it is being seen as a mobi file by Calibre that will not open.

I have tried converting to epub, fails to convert, azw3 and mobi. In the last two I can see the cover but the remainder of the book is complete gibberish.

I suspect it's a new DRM measure?

If I click on the imported mobi file 'as is' it will open the cover after a lengthy wait and then refuses to open the remainder of the book.

The errors are:

calibre, version 5.36.0
ERROR: Conversion failed: <p><b>Failed to convert: The Art of Electronics<p>
Many older e-book reader devices are incapable of displaying
EPUB files that have internal components over a certain size.
Therefore, when converting to EPUB, calibre automatically tries
to split up the EPUB into smaller sized pieces. For some
files that are large undifferentiated blocks of text, this
splitting fails.
<p>You can <b>work around the problem</b> by either increasing the
maximum split size under <i>EPUB output</i> in the conversion dialog,
or by turning on Heuristic processing, also in the conversion
dialog. Note that if you make the maximum split size too large,
your e-book reader may have trouble with the EPUB.


Convert book 1 of 1 (The Art of Electronics)
DeDRM v7.2.1: Trying to decrypt tdje423r.mobi
Using Library AlfCrypto DLL/DYLIB/SO
Using Library AlfCrypto DLL/DYLIB/SO
MobiDeDrm v1.0.
Copyright © 2008-2020 The Dark Reverser, Apprentice Harper et al.
Decrypting Mobipocket 4 ebook: The Art of Electronics
Got DSN key from database default_key
Found 4 keys to try after 0.2 seconds
Crypto Type is: 0
This book is not encrypted.
Decryption succeeded after 0.2 seconds
DeDRM v7.2.1: Finished after 0.2 seconds
Conversion options changed from defaults:
cover: 'C:\\Users\\SteveH\\AppData\\Local\\Temp\\calibre_ 6a502eqb\\okh31e_j.jpeg'
output_profile: 'kobo'
verbose: 2
read_metadata_from_opf: 'C:\\Users\\SteveH\\AppData\\Local\\Temp\\calibre_ 6a502eqb\\n85hqe1g.opf'
Resolved conversion options
calibre version: 5.36.0
{'asciiize': False,
'author_sort': None,
'authors': None,
'base_font_size': 0.0,
'book_producer': None,
'change_justification': 'original',
'chapter': "//*[((name()='h1' or name()='h2') and re:test(., "
"'\\s*((chapter|book|section|part)\\s+)|((prolog|p rologue|epilogue)(\\s+|$))', "
"'i')) or @class = 'chapter']",
'chapter_mark': 'pagebreak',
'comments': None,
'cover': 'C:\\Users\\SteveH\\AppData\\Local\\Temp\\calibre_ 6a502eqb\\okh31e_j.jpeg',
'debug_pipeline': None,
'dehyphenate': True,
'delete_blank_paragraphs': True,
'disable_font_rescaling': False,
'dont_split_on_page_breaks': False,
'duplicate_links_in_toc': False,
'embed_all_fonts': False,
'embed_font_family': None,
'enable_heuristics': False,
'epub_flatten': False,
'epub_inline_toc': False,
'epub_toc_at_end': False,
'epub_version': '2',
'expand_css': False,
'extra_css': None,
'extract_to': None,
'filter_css': '',
'fix_indents': True,
'flow_size': 260,
'font_size_mapping': None,
'format_scene_breaks': True,
'html_unwrap_factor': 0.4,
'input_encoding': None,
'input_profile': <calibre.customize.profiles.InputProfile object at 0x07920BF8>,
'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,
'no_chapters_in_toc': False,
'no_default_epub_cover': False,
'no_inline_navbars': False,
'no_svg_cover': False,
'output_profile': <calibre.customize.profiles.KoboReaderOutput object at 0x07920F28>,
'page_breaks_before': "//*[name()='h1' or name()='h2']",
'prefer_metadata_cover': False,
'preserve_cover_aspect_ratio': False,
'pretty_print': True,
'pubdate': None,
'publisher': None,
'rating': None,
'read_metadata_from_opf': 'C:\\Users\\SteveH\\AppData\\Local\\Temp\\calibre_ 6a502eqb\\n85hqe1g.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': '',
'search_replace': '[]',
'series': None,
'series_index': None,
'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,
'transform_css_rules': '[]',
'transform_html_rules': '[]',
'unsmarten_punctuation': False,
'unwrap_lines': True,
'use_auto_toc': False,
'verbose': 2}
DeDRM v7.2.1: Trying to decrypt 4vogq_8g.mobi
MobiDeDrm v1.0.
Copyright © 2008-2020 The Dark Reverser, Apprentice Harper et al.
Decrypting Mobipocket 4 ebook: The Art of Electronics
Got DSN key from database default_key
Found 4 keys to try after 0.1 seconds
Crypto Type is: 0
This book is not encrypted.
Decryption succeeded after 0.1 seconds
DeDRM v7.2.1: Finished after 0.1 seconds
InputFormatPlugin: MOBI Input running
on C:\Users\SteveH\AppData\Local\Temp\calibre_6a502eq b\un7mbl69.mobi
Extracting text...
Adding anchors...
Extracting images...
Cleaning up HTML...
Parsing HTML...
Malformed markup, parsing using html5-parser
Converting style information to CSS...
Creating OPF...
Parsing all content...
Parsing index.html ...
Initial parse failed, using more forgiving parsers
Parsing index.html as HTML
HTML 5 parsing failed, falling back to older parsers
Traceback (most recent call last):
File "calibre\ebooks\oeb\parse_utils.py", line 211, in parse_html
File "calibre\utils\xml_parse.py", line 26, in safe_xml_fromstring
File "src/lxml/etree.pyx", line 3237, in lxml.etree.fromstring
File "src/lxml/parser.pxi", line 1896, in lxml.etree._parseMemoryDocument
File "src/lxml/parser.pxi", line 1777, in lxml.etree._parseDoc
File "src/lxml/parser.pxi", line 1082, in lxml.etree._BaseParser._parseUnicodeDoc
File "src/lxml/parser.pxi", line 615, in lxml.etree._ParserContext._handleParseResultDoc
File "src/lxml/parser.pxi", line 725, in lxml.etree._handleParseResult
File "src/lxml/parser.pxi", line 654, in lxml.etree._raiseParseError
File "<string>", line 5
lxml.etree.XMLSyntaxError: Attribute __ redefined, line 5, column 1193

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
File "calibre\ebooks\oeb\parse_utils.py", line 218, in parse_html
File "calibre\utils\xml_parse.py", line 26, in safe_xml_fromstring
File "src/lxml/etree.pyx", line 3237, in lxml.etree.fromstring
File "src/lxml/parser.pxi", line 1896, in lxml.etree._parseMemoryDocument
File "src/lxml/parser.pxi", line 1777, in lxml.etree._parseDoc
File "src/lxml/parser.pxi", line 1082, in lxml.etree._BaseParser._parseUnicodeDoc
File "src/lxml/parser.pxi", line 615, in lxml.etree._ParserContext._handleParseResultDoc
File "src/lxml/parser.pxi", line 725, in lxml.etree._handleParseResult
File "src/lxml/parser.pxi", line 654, in lxml.etree._raiseParseError
File "<string>", line 5
lxml.etree.XMLSyntaxError: Attribute __ redefined, line 5, column 1193

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
File "calibre\ebooks\oeb\parse_utils.py", line 224, in parse_html
File "calibre\ebooks\oeb\parse_utils.py", line 105, in html5_parse
ValueError: HTML 5 parsing resulted in a tree with nesting depth > 100

Forcing index.html into XHTML namespace
Parsing styles.css ...
Generating default TOC from spine...
Merging user specified metadata...
Detecting structure...
Auto generated TOC with 0 entries.
Flattening CSS and remapping font sizes...
Source base font size is 12.00000pt
Removing fake margins...
Cleaning up manifest...
Trimming unused files from manifest...
Trimming 'images/00001.jpg' from manifest
Trimming 'images/00002.jpg' from manifest
Creating EPUB Output...
Rescaling image from 920x1196 to 512x666 cover.jpeg
Splitting markup on page breaks and flow limits, if any...
Looking for large trees in index.html...
Found large tree #0
Splitting...
Split point: {http://www.w3.org/1999/xhtml}gf________________pp_______4_____c__0_______ _r__9_______m_______g___h1c___j______l__._________ _____ /*/*[2]/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*
Committed sub-tree #1 (221 KB)
Split tree still too large: 365 KB
Splitting...
Split point: {http://www.w3.org/1999/xhtml}d______q__2fl___b8____xx____j__k______h4_ /*/*[2]/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*[2]/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*
Committed sub-tree #2 (159 KB)
Split tree still too large: 278 KB
Splitting...
Split point: {http://www.w3.org/1999/xhtml}vw________________eic________________h2__w__ cf_______________________9____f__v____________k___ _____ /*/*[2]/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*
Adjusted split point to ancestor
Split tree too small
Splitting...
Traceback (most recent call last):
File "runpy.py", line 194, in _run_module_as_main
File "runpy.py", line 87, in _run_code
File "site.py", line 82, in <module>
File "site.py", line 77, in main
File "site.py", line 49, in run_entry_point
File "calibre\utils\ipc\worker.py", line 215, in main
File "calibre\gui2\convert\gui_conversion.py", line 38, in gui_convert_override
File "calibre\gui2\convert\gui_conversion.py", line 25, in gui_convert
File "calibre\ebooks\conversion\plumber.py", line 1281, in run
File "calibre\ebooks\conversion\plugins\epub_output.py" , line 206, in convert
File "calibre\ebooks\oeb\transforms\split.py", line 65, in __call__
File "calibre\ebooks\oeb\transforms\split.py", line 74, in split_item
File "calibre\ebooks\oeb\transforms\split.py", line 223, in __init__
File "calibre\ebooks\oeb\transforms\split.py", line 371, in split_to_size
File "calibre\ebooks\oeb\transforms\split.py", line 371, in split_to_size
File "calibre\ebooks\oeb\transforms\split.py", line 356, in split_to_size
File "calibre\ebooks\oeb\transforms\split.py", line 349, in split_to_size
calibre.ebooks.oeb.transforms.split.SplitError: Could not find reasonable point at which to split: index.html Sub-tree size: 278 KB

Can someone please point me in the right direction to rectify this mess please?

[jhowell]

That problem is caused by a bug in the DRM removal plugin. It fails to detect when a MOBI file contains PDF content (AZW4 format).

You can work around the problem by installing the KindleUnpack plugin for calibre. Select the book entry in calibre and use the "Extract PDF" function of KindleUnpack to obtain the embedded PDF.