[Arason]

I am new to Calibre.

Can anyone help or lead into a direction to understand what is going on?

Thanks,
Andy

calibre, version 6.13.0
ERROR: Loading book failed: Failed to open the book at C:\Users\Andy\Calibre Library\Unknown\CR!GV5YSBJY515091RFJRDCMC8KY4CG.az w (12)\CR!GV5YSBJY515091RFJRDCMC8KY4CG - Unknown.md. Click "Show details" for more info.

Failed to convert book: C:\Users\Andy\Calibre Library\Unknown\CR!GV5YSBJY515091RFJRDCMC8KY4CG.az w (12)\CR!GV5YSBJY515091RFJRDCMC8KY4CG - Unknown.md with error:
InputFormatPlugin: TXT Input running
on C:\Users\Andy\Calibre Library\Unknown\CR!GV5YSBJY515091RFJRDCMC8KY4CG.az w (12)\CR!GV5YSBJY515091RFJRDCMC8KY4CG - Unknown.md
File extension indicates particular formatting. Forcing formatting type to: markdown
Language not specified
Creator not specified
Building file list...
IgnoreFile('Could not read from file: C:\\Users\\Andy\\AppData\\Local\\calibre-cache\\ev2\\t\\c0-kmfyivfu\\"��H�I eGpl� \x17���ֱ=0\x0e�ڂ�g���r�\x10K�ت���w6 with error: [Errno 22] Invalid argument: \'C:\\\\Users\\\\Andy\\\\AppData\\\\Local\\\\calib re-cache\\\\ev2\\\\t\\\\c0-kmfyivfu\\\\"��H�I eGpl� \\x17���ֱ=0\\x0e�ڂ�g���r�\\x10K�ت���w6\'')
IgnoreFile('Could not read from file: C:\\Users\\Andy\\AppData\\Local\\calibre-cache\\ev2\\t\\c0-kmfyivfu\\�H�� ����\x15���E�N�\x07\x07�5MQ\'3Yb�Ժ�.\u07be��r��֭Z5 58��XZK�� with error: [Errno 22] Invalid argument: "C:\\\\Users\\\\Andy\\\\AppData\\\\Local\\\\calibr e-cache\\\\ev2\\\\t\\\\c0-kmfyivfu\\\\�H�� ����\\x15���E�N�\\x07\\x07�5MQ\'3Yb�Ժ�.\\u07be��r� �֭Z558��XZK��"')
Failed to run pipe worker with command: from calibre.srv.render_book import viewer_main; viewer_main()
Traceback (most recent call last):
File "runpy.py", line 196, in _run_module_as_main
File "runpy.py", line 86, 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 196, in main
File "<string>", line 1, in <module>
File "calibre\srv\render_book.py", line 821, in viewer_main
File "calibre\srv\render_book.py", line 812, in render_for_viewer
File "calibre\srv\render_book.py", line 789, in render
File "calibre\ebooks\oeb\iterator\book.py", line 62, in extract_book
File "calibre\customize\conversion.py", line 242, in __call__
File "calibre\ebooks\conversion\plugins\txt_input.p y", line 310, in convert
File "calibre\ebooks\conversion\plugins\html_input. py", line 90, in convert
File "calibre\ebooks\conversion\plugins\html_input. py", line 153, in create_oebbook
File "calibre\ebooks\html\input.py", line 287, in get_filelist
File "calibre\ebooks\html\input.py", line 265, in traverse
File "calibre\ebooks\html\input.py", line 109, in __init__
ValueError: embedded null character