XDA book format??

[DMee]

Been trying to get both ePub and Mobi versions of all my ebooks. Some are supposedly .mobi files but Kindle app won't open and when I try Calibre convert I get told they are XDA format?? - see below

Any quick suggestions - otherwise I'll just delete them and give up

================

calibre, version 0.8.63 (win32, isfrozen: True)
Conversion Error: Failed: Convert book 1 of 1 (Instinctive)

Convert book 1 of 1 (Instinctive)
Resolved conversion options
calibre version: 0.8.63
{'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|prologue|epilogue\\s+', 'i')) or @class = 'chapter']",
'chapter_mark': u'pagebreak',
'comments': None,
'cover': u'C:\\Users\\David\\AppData\\Local\\Temp\\calibre_ 0.8.63_tmp_jfdexs\\4lqhsx.jpeg',
'debug_pipeline': None,
'dehyphenate': True,
'delete_blank_paragraphs': True,
'disable_font_rescaling': False,
'duplicate_links_in_toc': False,
'enable_heuristics': True,
'extra_css': 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 0x021A9230>,
'insert_blank_line': True,
'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': True,
'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_inline_navbars': False,
'output_profile': <calibre.customize.profiles.iPadOutput object at 0x021A94D0>,
'page_breaks_before': u"//*[name()='h1' or name()='h2']",
'prefer_metadata_cover': False,
'pretty_print': False,
'pubdate': None,
'publisher': None,
'rating': None,
'read_metadata_from_opf': u'C:\\Users\\David\\AppData\\Local\\Temp\\calibre_ 0.8.63_tmp_jfdexs\\0cicfu.opf',
'remove_fake_margins': True,
'remove_first_image': False,
'remove_paragraph_spacing': True,
'remove_paragraph_spacing_indent_size': 1.5,
'renumber_headings': True,
'replace_scene_breaks': u'',
'search_replace': '[]',
'series': None,
'series_index': None,
'smarten_punctuation': True,
'sr1_replace': None,
'sr1_search': None,
'sr2_replace': None,
'sr2_search': None,
'sr3_replace': None,
'sr3_search': None,
'tags': None,
'timestamp': None,
'title': None,
'title_sort': None,
'toc_filter': None,
'toc_threshold': 6,
'unsmarten_punctuation': False,
'unwrap_lines': True,
'use_auto_toc': False,
'verbose': 2}
InputFormatPlugin: MOBI Input running
on C:\Users\David\AppData\Local\Temp\calibre_0.8.63_t mp_jfdexs\hcnkb_.mobi
Python function terminated unexpectedly
Unknown book type: '\x07?-\xb6J\x07=\xda' (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 192, 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 979, in run
File "site-packages\calibre\customize\conversion.py", line 239, in __call__
File "site-packages\calibre\ebooks\conversion\plugins\mobi_in put.py", line 32, in convert
File "site-packages\calibre\ebooks\mobi\reader\mobi6.py", line 83, in __init__
calibre.ebooks.mobi.MobiError: Unknown book type: '\x07?-\xb6J\x07=\xda'

[kovidgoyal]

Those are likely some old PDB files that have incorrectly been given the .mobi extension. calibre wont be able to convert them.

[DMee]

Cheers