DRM not removing for purchased book

[Duffist]

Question / bug report

I just installed Calibre 7.23.0 and DeDRM (first 7.2.1, then tried 10.0.9) and converted one recently purchased book (on 7.2.1). When I tried the second book I got a DRM error message that it could not be converted to KePub. That's when I removed 7.2.1 and installed 10.0.9 and tried again, but with the same result. I purchased this book from Amazon on the same Kindle serial number as the one I was able to convert. The book that is erroring out was purchased on October 27 , 2024. The book that successfully converted was purchased on December 30, 2024. Below is my bug report:

ApplicationPaletteChange event ignored
Using calibre Qt style: True
calibre Debug log
calibre 7.23 embedded-python: True
Windows-10-10.0.26100-SP0 Windows ('64bit', 'WindowsPE')
('Windows', '10', '10.0.26100')
Python 3.11.5
Windows: ('10', '10.0.26100', 'SP0', 'Multiprocessor Free')
Interface language: None
EXE path: C:\Program Files\Calibre2\calibre-debug.exe
Successfully initialized third party plugins: DeDRM (10, 0, 9) && KePub Input (3, 6, 6) && KePub Metadata Reader (3, 4, 3) && KePub Metadata Writer (3, 4, 3) && KePub Output (3, 7, 2) && KoboTouchExtended (3, 7, 2)
calibre 7.23 embedded-python: True
Windows-10-10.0.26100-SP0 Windows ('64bit', 'WindowsPE')
('Windows', '10', '10.0.26100')
Python 3.11.5
Windows: ('10', '10.0.26100', 'SP0', 'Multiprocessor Free')
Interface language: None
EXE path: C:\Program Files\Calibre2\calibre-debug.exe
Successfully initialized third party plugins: DeDRM (10, 0, 9) && KePub Input (3, 6, 6) && KePub Metadata Reader (3, 4, 3) && KePub Metadata Writer (3, 4, 3) && KePub Output (3, 7, 2) && KoboTouchExtended (3, 7, 2)
QPA platform: windows
devicePixelRatio: 2.0
logicalDpi: 96.0 x 96.0
physicalDpi: 133.4890510948905 x 133.24590163934425
[0.00] Starting up...
[0.00] Showing splash screen...
[1.30] splash screen shown
[1.30] Initializing db...
[1.30] db initialized
[1.30] Constructing main UI...
[1.64] GUI main window shown
[1.67] main UI initialized...
[1.67] Hiding splash screen
[1.69] splash screen hidden
[1.69] Started up in 1.69 seconds with 1 books
DeDRM v10.0.9: Trying to decrypt My Darlings.azw3
MobiDeDrm v1.1.
Copyright © 2008-2022 The Dark Reverser, Apprentice Harper et al.
Decrypting Kindle Format 8 ebook: My Darlings
Found 2 keys to try after 0.6 seconds
Crypto Type is: 2
DeDRM v10.0.9: Failed to decrypt with error: No key found in 2 PIDs tried.
DeDRM v10.0.9: Looking for new default Kindle Key after 0.6 seconds
searching for kinfoFiles in C:\Users\twduf\AppData\Local
No K4PC kindle.info/kinf/kinf2011 files have been found.
DeDRM v10.0.9: Ultimately failed to decrypt after 0.6 seconds. Read the FAQs at noDRM's repository: https://github.com/noDRM/DeDRM_tools/blob/master/FAQs.md
Running file type plugin DeDRM failed with traceback:
Traceback (most recent call last):
File "calibre_plugins.dedrm.init", line 931, in KindleMobiDecrypt
File "C:\Users\twduf\AppData\Roaming\calibre\plugins\DeDRM.zip\k4mobidedrm.py", line 203, in GetDecryptedBook
File "C:\Users\twduf\AppData\Roaming\calibre\plugins\DeDRM.zip\mobidedrm.py", line 401, in processBook
mobidedrm.DrmException: No key found in 2 PIDs tried.

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
File "calibre\customize\ui.py", line 201, in _run_filetype_plugins
File "calibre_plugins.dedrm.init", line 1030, in run
File "calibre_plugins.dedrm.init", line 981, in KindleMobiDecrypt
calibre_plugins.dedrm.DeDRMError: DeDRM v10.0.9: Ultimately failed to decrypt after 0.6 seconds. Read the FAQs at noDRM's repository: https://github.com/noDRM/DeDRM_tools/blob/master/FAQs.md
Added My Darlings to db in: 0.1
Added 1 books in 1.2 seconds
DEBUG: 0.0 Metadata sources cache was recently updated not updating again
Worker Launch took: 0.05 seconds
Job: 0 Convert book 1 of 1 (My Darlings) finished
Convert book 1 of 1 (My Darlings)
DeDRM v10.0.9: Trying to decrypt q6mnslxi.azw3
MobiDeDrm v1.1.
Copyright © 2008-2022 The Dark Reverser, Apprentice Harper et al.
Decrypting Kindle Format 8 ebook: My Darlings
Found 2 keys to try after 0.5 seconds
Crypto Type is: 2
DeDRM v10.0.9: Failed to decrypt with error: No key found in 2 PIDs tried.
DeDRM v10.0.9: Looking for new default Kindle Key after 0.5 seconds
searching for kinfoFiles in C:\Users\twduf\AppData\Local
No K4PC kindle.info/kinf/kinf2011 files have been found.
DeDRM v10.0.9: Ultimately failed to decrypt after 0.5 seconds. Read the FAQs at noDRM's repository: https://github.com/noDRM/DeDRM_tools/blob/master/FAQs.md
Running file type plugin DeDRM failed with traceback:
Traceback (most recent call last):
File "calibre_plugins.dedrm.init", line 931, in KindleMobiDecrypt
File "C:\Users\twduf\AppData\Roaming\calibre\plugins\DeDRM.zip\k4mobidedrm.py", line 203, in GetDecryptedBook
File "C:\Users\twduf\AppData\Roaming\calibre\plugins\DeDRM.zip\mobidedrm.py", line 401, in processBook
mobidedrm.DrmException: No key found in 2 PIDs tried.

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "calibre\customize\ui.py", line 201, in _run_filetype_plugins
  File "calibre_plugins.dedrm.__init__", line 1030, in run
  File "calibre_plugins.dedrm.__init__", line 981, in KindleMobiDecrypt
calibre_plugins.dedrm.DeDRMError: DeDRM v10.0.9: Ultimately failed to decrypt after 0.5 seconds. Read the FAQs at noDRM's repository: https://github.com/noDRM/DeDRM_tools/blob/master/FAQs.md
Conversion options changed from defaults:
  output_profile: 'kobo'
  verbose: 2
  cover: 'C:\\Users\\twduf\\AppData\\Local\\Temp\\calibre_mij3uoaj\\je579eam.jpeg'
  read_metadata_from_opf: 'C:\\Users\\twduf\\AppData\\Local\\Temp\\calibre_mij3uoaj\\45cykzv7.opf'
Resolved conversion options
calibre version: 7.23.0
{'add_alt_text_to_img': False,
 '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|prologue|epilogue)(\\s+|$))', "
            "'i')) or @class = 'chapter']",
 'chapter_mark': 'pagebreak',
 'comments': None,
 'cover': 'C:\\Users\\twduf\\AppData\\Local\\Temp\\calibre_mij3uoaj\\je579eam.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_max_image_size': 'none',
 'epub_toc_at_end': False,
 'epub_version': '3',
 '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 0x00000269684C3AD0>,
 'insert_blank_line': False,
 'insert_blank_line_size': 0.5,
 'insert_metadata': False,
 'isbn': None,
 'italicize_common_cases': True,
 'keep_ligatures': False,
 'kepub_clean_markup': True,
 'kepub_disable_hyphenation': False,
 'kepub_hyphenate': True,
 'kepub_hyphenate_chars': 6,
 'kepub_hyphenate_chars_after': 3,
 'kepub_hyphenate_chars_before': 3,
 'kepub_hyphenate_limit_lines': 2,
 '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 0x00000269684B3A50>,
 '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\\twduf\\AppData\\Local\\Temp\\calibre_mij3uoaj\\45cykzv7.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 v10.0.9: Trying to decrypt q6mnslxi.azw3
MobiDeDrm v1.1.
Copyright © 2008-2022 The Dark Reverser, Apprentice Harper et al.
Decrypting Kindle Format 8 ebook: My Darlings
Found 2 keys to try after 0.0 seconds
Crypto Type is: 2
DeDRM v10.0.9: Failed to decrypt with error: No key found in 2 PIDs tried.
DeDRM v10.0.9: Looking for new default Kindle Key after 0.0 seconds
searching for kinfoFiles in C:\Users\twduf\AppData\Local
No K4PC kindle.info/kinf/kinf2011 files have been found.
DeDRM v10.0.9: Ultimately failed to decrypt after 0.0 seconds. Read the FAQs at noDRM's repository: https://github.com/noDRM/DeDRM_tools/blob/master/FAQs.md
Running file type plugin DeDRM failed with traceback:
Traceback (most recent call last):
  File "calibre_plugins.dedrm.__init__", line 931, in KindleMobiDecrypt
  File "C:\Users\twduf\AppData\Roaming\calibre\plugins\DeDRM.zip\k4mobidedrm.py", line 203, in GetDecryptedBook
  File "C:\Users\twduf\AppData\Roaming\calibre\plugins\DeDRM.zip\mobidedrm.py", line 401, in processBook
mobidedrm.DrmException: No key found in 2 PIDs tried.

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "calibre\customize\ui.py", line 201, in _run_filetype_plugins
  File "calibre_plugins.dedrm.__init__", line 1030, in run
  File "calibre_plugins.dedrm.__init__", line 981, in KindleMobiDecrypt
calibre_plugins.dedrm.DeDRMError: DeDRM v10.0.9: Ultimately failed to decrypt after 0.0 seconds. Read the FAQs at noDRM's repository: https://github.com/noDRM/DeDRM_tools/blob/master/FAQs.md
InputFormatPlugin: MOBI Input running
on C:\Users\twduf\AppData\Local\Temp\calibre_mij3uoaj\q6mnslxi.azw3
Found KF8 MOBI of type 'standalone'
Traceback (most recent call last):
  File "runpy.py", line 198, in _run_module_as_main
  File "runpy.py", line 88, in _run_code
  File "site.py", line 83, in <module>
  File "site.py", line 78, in main
  File "site.py", line 50, 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 1129, in run
  File "calibre\customize\conversion.py", line 245, in __call__
  File "calibre\ebooks\conversion\plugins\mobi_input.py", line 45, in convert
  File "calibre\ebooks\mobi\reader\mobi8.py", line 87, in __call__
  File "calibre\ebooks\mobi\reader\mobi6.py", line 163, in check_for_drm
calibre.ebooks.DRMError: My Darlings

Which version of Calibre are you running?

7.23.0

Which version of the DeDRM plugin are you running?

10.0.9

If applicable, which version of the Kindle software are you running?

Fire HD 8 (10th Generation) running Fire OS7.3.3.1

Log output

ApplicationPaletteChange event ignored
Using calibre Qt style: True
calibre Debug log
calibre 7.23  embedded-python: True
Windows-10-10.0.26100-SP0 Windows ('64bit', 'WindowsPE')
('Windows', '10', '10.0.26100')
Python 3.11.5
Windows: ('10', '10.0.26100', 'SP0', 'Multiprocessor Free')
Interface language: None
EXE path: C:\Program Files\Calibre2\calibre-debug.exe
Successfully initialized third party plugins: DeDRM (10, 0, 9) && KePub Input (3, 6, 6) && KePub Metadata Reader (3, 4, 3) && KePub Metadata Writer (3, 4, 3) && KePub Output (3, 7, 2) && KoboTouchExtended (3, 7, 2)
calibre 7.23  embedded-python: True
Windows-10-10.0.26100-SP0 Windows ('64bit', 'WindowsPE')
('Windows', '10', '10.0.26100')
Python 3.11.5
Windows: ('10', '10.0.26100', 'SP0', 'Multiprocessor Free')
Interface language: None
EXE path: C:\Program Files\Calibre2\calibre-debug.exe
Successfully initialized third party plugins: DeDRM (10, 0, 9) && KePub Input (3, 6, 6) && KePub Metadata Reader (3, 4, 3) && KePub Metadata Writer (3, 4, 3) && KePub Output (3, 7, 2) && KoboTouchExtended (3, 7, 2)
QPA platform: windows
devicePixelRatio: 2.0
logicalDpi: 96.0 x 96.0
physicalDpi: 133.4890510948905 x 133.24590163934425
[0.00] Starting up...
[0.00] Showing splash screen...
[1.30] splash screen shown
[1.30] Initializing db...
[1.30] db initialized
[1.30] Constructing main UI...
[1.64] GUI main window shown
[1.67] main UI initialized...
[1.67] Hiding splash screen
[1.69] splash screen hidden
[1.69] Started up in 1.69 seconds with 1 books
DeDRM v10.0.9: Trying to decrypt My Darlings.azw3
MobiDeDrm v1.1.
Copyright © 2008-2022 The Dark Reverser, Apprentice Harper et al.
Decrypting Kindle Format 8 ebook: My Darlings
Found 2 keys to try after 0.6 seconds
Crypto Type is: 2
DeDRM v10.0.9: Failed to decrypt with error: No key found in 2 PIDs tried.
DeDRM v10.0.9: Looking for new default Kindle Key after 0.6 seconds
searching for kinfoFiles in C:\Users\twduf\AppData\Local
No K4PC kindle.info/kinf/kinf2011 files have been found.
DeDRM v10.0.9: Ultimately failed to decrypt after 0.6 seconds. Read the FAQs at noDRM's repository: https://github.com/noDRM/DeDRM_tools/blob/master/FAQs.md
Running file type plugin DeDRM failed with traceback:
Traceback (most recent call last):
  File "calibre_plugins.dedrm.__init__", line 931, in KindleMobiDecrypt
  File "C:\Users\twduf\AppData\Roaming\calibre\plugins\DeDRM.zip\k4mobidedrm.py", line 203, in GetDecryptedBook
  File "C:\Users\twduf\AppData\Roaming\calibre\plugins\DeDRM.zip\mobidedrm.py", line 401, in processBook
mobidedrm.DrmException: No key found in 2 PIDs tried.

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "calibre\customize\ui.py", line 201, in _run_filetype_plugins
  File "calibre_plugins.dedrm.__init__", line 1030, in run
  File "calibre_plugins.dedrm.__init__", line 981, in KindleMobiDecrypt
calibre_plugins.dedrm.DeDRMError: DeDRM v10.0.9: Ultimately failed to decrypt after 0.6 seconds. Read the FAQs at noDRM's repository: https://github.com/noDRM/DeDRM_tools/blob/master/FAQs.md
Added My Darlings to db in: 0.1
Added 1 books in 1.2 seconds
DEBUG:    0.0 Metadata sources cache was recently updated not updating again
Worker Launch took: 0.05 seconds
Job: 0 Convert book 1 of 1 (My Darlings) finished
Convert book 1 of 1 (My Darlings)
	DeDRM v10.0.9: Trying to decrypt q6mnslxi.azw3
	MobiDeDrm v1.1.
	Copyright © 2008-2022 The Dark Reverser, Apprentice Harper et al.
	Decrypting Kindle Format 8 ebook: My Darlings
	Found 2 keys to try after 0.5 seconds
	Crypto Type is: 2
	DeDRM v10.0.9: Failed to decrypt with error: No key found in 2 PIDs tried.
	DeDRM v10.0.9: Looking for new default Kindle Key after 0.5 seconds
	searching for kinfoFiles in C:\Users\twduf\AppData\Local
	No K4PC kindle.info/kinf/kinf2011 files have been found.
	DeDRM v10.0.9: Ultimately failed to decrypt after 0.5 seconds. Read the FAQs at noDRM's repository: https://github.com/noDRM/DeDRM_tools/blob/master/FAQs.md
	Running file type plugin DeDRM failed with traceback:
	Traceback (most recent call last):
	  File "calibre_plugins.dedrm.__init__", line 931, in KindleMobiDecrypt
	  File "C:\Users\twduf\AppData\Roaming\calibre\plugins\DeDRM.zip\k4mobidedrm.py", line 203, in GetDecryptedBook
	  File "C:\Users\twduf\AppData\Roaming\calibre\plugins\DeDRM.zip\mobidedrm.py", line 401, in processBook
	mobidedrm.DrmException: No key found in 2 PIDs tried.
	
	During handling of the above exception, another exception occurred:
	
	Traceback (most recent call last):
	  File "calibre\customize\ui.py", line 201, in _run_filetype_plugins
	  File "calibre_plugins.dedrm.__init__", line 1030, in run
	  File "calibre_plugins.dedrm.__init__", line 981, in KindleMobiDecrypt
	calibre_plugins.dedrm.DeDRMError: DeDRM v10.0.9: Ultimately failed to decrypt after 0.5 seconds. Read the FAQs at noDRM's repository: https://github.com/noDRM/DeDRM_tools/blob/master/FAQs.md
	Conversion options changed from defaults:
	  output_profile: 'kobo'
	  verbose: 2
	  cover: 'C:\\Users\\twduf\\AppData\\Local\\Temp\\calibre_mij3uoaj\\je579eam.jpeg'
	  read_metadata_from_opf: 'C:\\Users\\twduf\\AppData\\Local\\Temp\\calibre_mij3uoaj\\45cykzv7.opf'
	Resolved conversion options
	calibre version: 7.23.0
	{'add_alt_text_to_img': False,
	 '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|prologue|epilogue)(\\s+|$))', "
	            "'i')) or @class = 'chapter']",
	 'chapter_mark': 'pagebreak',
	 'comments': None,
	 'cover': 'C:\\Users\\twduf\\AppData\\Local\\Temp\\calibre_mij3uoaj\\je579eam.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_max_image_size': 'none',
	 'epub_toc_at_end': False,
	 'epub_version': '3',
	 '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 0x00000269684C3AD0>,
	 'insert_blank_line': False,
	 'insert_blank_line_size': 0.5,
	 'insert_metadata': False,
	 'isbn': None,
	 'italicize_common_cases': True,
	 'keep_ligatures': False,
	 'kepub_clean_markup': True,
	 'kepub_disable_hyphenation': False,
	 'kepub_hyphenate': True,
	 'kepub_hyphenate_chars': 6,
	 'kepub_hyphenate_chars_after': 3,
	 'kepub_hyphenate_chars_before': 3,
	 'kepub_hyphenate_limit_lines': 2,
	 '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 0x00000269684B3A50>,
	 '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\\twduf\\AppData\\Local\\Temp\\calibre_mij3uoaj\\45cykzv7.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 v10.0.9: Trying to decrypt q6mnslxi.azw3
	MobiDeDrm v1.1.
	Copyright © 2008-2022 The Dark Reverser, Apprentice Harper et al.
	Decrypting Kindle Format 8 ebook: My Darlings
	Found 2 keys to try after 0.0 seconds
	Crypto Type is: 2
	DeDRM v10.0.9: Failed to decrypt with error: No key found in 2 PIDs tried.
	DeDRM v10.0.9: Looking for new default Kindle Key after 0.0 seconds
	searching for kinfoFiles in C:\Users\twduf\AppData\Local
	No K4PC kindle.info/kinf/kinf2011 files have been found.
	DeDRM v10.0.9: Ultimately failed to decrypt after 0.0 seconds. Read the FAQs at noDRM's repository: https://github.com/noDRM/DeDRM_tools/blob/master/FAQs.md
	Running file type plugin DeDRM failed with traceback:
	Traceback (most recent call last):
	  File "calibre_plugins.dedrm.__init__", line 931, in KindleMobiDecrypt
	  File "C:\Users\twduf\AppData\Roaming\calibre\plugins\DeDRM.zip\k4mobidedrm.py", line 203, in GetDecryptedBook
	  File "C:\Users\twduf\AppData\Roaming\calibre\plugins\DeDRM.zip\mobidedrm.py", line 401, in processBook
	mobidedrm.DrmException: No key found in 2 PIDs tried.
	
	During handling of the above exception, another exception occurred:
	
	Traceback (most recent call last):
	  File "calibre\customize\ui.py", line 201, in _run_filetype_plugins
	  File "calibre_plugins.dedrm.__init__", line 1030, in run
	  File "calibre_plugins.dedrm.__init__", line 981, in KindleMobiDecrypt
	calibre_plugins.dedrm.DeDRMError: DeDRM v10.0.9: Ultimately failed to decrypt after 0.0 seconds. Read the FAQs at noDRM's repository: https://github.com/noDRM/DeDRM_tools/blob/master/FAQs.md
	InputFormatPlugin: MOBI Input running
	on C:\Users\twduf\AppData\Local\Temp\calibre_mij3uoaj\q6mnslxi.azw3
	Found KF8 MOBI of type 'standalone'
	Traceback (most recent call last):
	  File "runpy.py", line 198, in _run_module_as_main
	  File "runpy.py", line 88, in _run_code
	  File "site.py", line 83, in <module>
	  File "site.py", line 78, in main
	  File "site.py", line 50, 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 1129, in run
	  File "calibre\customize\conversion.py", line 245, in __call__
	  File "calibre\ebooks\conversion\plugins\mobi_input.py", line 45, in convert
	  File "calibre\ebooks\mobi\reader\mobi8.py", line 87, in __call__
	  File "calibre\ebooks\mobi\reader\mobi6.py", line 163, in check_for_drm
	calibre.ebooks.DRMError: My Darlings

[ElleKayEm]

Won't work with a book for a Fire. If you don't have a pre-2024 E-ink Kindle, see method 2a here: https://www.mobileread.com/forums/showthread.php?t=361503

Book that "worked" was probably already DRM-free.

[Duffist]

Thank you for the guidance and the explanation! I was kind of stumped when the very first one worked perfectly, but now it makes sense.

Won't work with a book for a Fire. If you don't have a pre-2024 E-ink Kindle, see method 2a here: https://www.mobileread.com/forums/showthread.php?t=361503

Book that "worked" was probably already DRM-free.