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apprenticeharper / DeDRM_tools

DeDRM tools for ebooks

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[QUESTION] Import of drm ebook failed - help needed

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CheckList

  • The Title and The Log Title are setted correctly.
  • Clarified about my environment.
  • Code block is used for the log.

Import of drm ebook failed - help needed

My Environment

Calibre: Version 6.28.1

DeDRM: Version 7.2.1

Log

Import Log Debug Mode 
C:\Users\Lenovo>calibre-debug -g
calibre 6.28.1  embedded-python: True
Windows-10-10.0.19045-SP0 Windows ('64bit', 'WindowsPE')
('Windows', '10', '10.0.19045')
Python 3.10.1
Windows: ('10', '10.0.19045', 'SP0', 'Multiprocessor Free')
Interface language: de
Successfully initialized third party plugins: DeDRM (7, 2, 1)
QPA platform: windows
devicePixelRatio: 1.0
logicalDpi: 96.0 x 96.0
physicalDpi: 157.8252427184466 x 157.65517241379308
ApplicationPaletteChange event ignored
Using calibre Qt style: True
ApplicationPaletteChange event received
[0.00] Starting up...
[0.00] Showing splash screen...
[0.20] splash screen shown
[0.20] Initializing db...
[0.22] db initialized
[0.22] Constructing main UI...
[0.89] main UI initialized...
[0.89] Hiding splash screen
Starting QuickView
[1.62] splash screen hidden
[1.62] Started up in 1.62 seconds with 250 books
stdout+stderr from file dialog helper: [b'', b'']
piped data from file dialog helper: [b',\x17I\xecXq\xd1\x06\x05\xbc`\x90\xde\x19+\x1a\xe7z\xe50<\x9bVY\xb4\n7\x93s\x82\x9f\xb3', b'C:\\Users\\Lenovo\\Documents\\My Digital Editions\\Microsoft\xc2\xae Project Fundamentals.pdf']
DeDRM v7.2.1: Trying to decrypt Microsoft® Project Fundamentals.pdf
DeDRM v7.2.1: Microsoft® Project Fundamentals.pdf is a PDF ebook
DeDRM v7.2.1: Trying Encryption key default_key
error writing pdf: max() arg is an empty sequence
DeDRM v7.2.1: Failed to decrypt with key default_key after 0.1 seconds
DeDRM v7.2.1: Looking for new default Adobe Digital Editions Keys after 0.1 seconds
Found 1 keys
DeDRM v7.2.1: Trying a new default key
error writing pdf: max() arg is an empty sequence
DeDRM v7.2.1: Failed to decrypt with new default key after 0.2 seconds
DeDRM v7.2.1: Ultimately failed to decrypt after 0.2 seconds. Read the FAQs at Harper's repository: https://github.com/apprenticeharper/DeDRM_tools/blob/master/FAQs.md
Running file type plugin DeDRM failed with traceback:
Traceback (most recent call last):
  File "calibre\customize\ui.py", line 187, in _run_filetype_plugins
  File "calibre_plugins.dedrm.__init__", line 640, in run
  File "calibre_plugins.dedrm.__init__", line 515, in PDFDecrypt
calibre_plugins.dedrm.DeDRMError: DeDRM v7.2.1: Ultimately failed to decrypt after 0.2 seconds. Read the FAQs at Harper's repository: https://github.com/apprenticeharper/DeDRM_tools/blob/master/FAQs.md
Traceback (most recent call last):
  File "calibre\customize\ui.py", line 469, in get_file_type_metadata
  File "calibre\customize\builtins.py", line 324, in get_metadata
  File "calibre\ebooks\metadata\pdf.py", line 124, in get_metadata
ValueError: Could not read info dict from PDF
Added Microsoft® Project Fundamentals to db in: 0.1
Added 1 books in 1.2 seconds
Syntax Error: Couldn't find the 'EBX_HANDLER' security handler
pdfinfo errored out with return code: 1
Exception ignored in: <function NativeFunction.__del__ at 0x00000162602213F0>
Traceback (most recent call last):
  File "calibre_plugins.dedrm.adobekey", line 268, in __del__
TypeError: 'NoneType' object is not callable
Exception ignored in: <function NativeFunction.__del__ at 0x00000162602213F0>
Traceback (most recent call last):
  File "calibre_plugins.dedrm.adobekey", line 268, in __del__
TypeError: 'NoneType' object is not callable