Thank you for your answer. I uninstalled calibre using these commands
Then i installed calibre with the command provided in the website but still i get the same error
Code:
calibre, version 0.8.52
ERROR: Conversion Error: <b>Failed</b>: Convert book 1 of 1 (Beginning PHP and MySQL From Novice to Professional (4rd edition))
Convert book 1 of 1 (Beginning PHP and MySQL From Novice to Professional (4rd edition))
Resolved conversion options
calibre version: 0.8.52
{'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(., '\\s*((chapter|book|section|part)\\s+)|((prolog|prologue|epilogue)(\\s+|$))', 'i')) or @class = 'chapter']",
'chapter_mark': u'pagebreak',
'comments': None,
'cover': u'/tmp/calibre_0.8.52_tmp_bfRfMX/lSBMSb.jpeg',
'debug_pipeline': None,
'dehyphenate': True,
'delete_blank_paragraphs': True,
'disable_font_rescaling': False,
'dont_compress': False,
'duplicate_links_in_toc': False,
'enable_heuristics': False,
'extra_css': None,
'extract_to': 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 0x28c8290>,
'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,
'mobi_ignore_margins': False,
'mobi_keep_original_images': False,
'mobi_toc_at_start': False,
'new_pdf_engine': False,
'no_chapters_in_toc': False,
'no_images': False,
'no_inline_navbars': False,
'no_inline_toc': False,
'output_profile': <calibre.customize.profiles.GenericEink object at 0x28c8690>,
'page_breaks_before': u"//*[name()='h1' or name()='h2']",
'personal_doc': u'[PDOC]',
'prefer_author_sort': False,
'prefer_metadata_cover': False,
'pretty_print': False,
'pubdate': None,
'publisher': None,
'rating': None,
'read_metadata_from_opf': u'/tmp/calibre_0.8.52_tmp_bfRfMX/TKSuqo.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': u'',
'search_replace': '[]',
'series': None,
'series_index': None,
'share_not_sync': False,
'smarten_punctuation': False,
'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,
'toc_title': None,
'unsmarten_punctuation': False,
'unwrap_factor': 0.45,
'unwrap_lines': True,
'use_auto_toc': False,
'verbose': 2}
InputFormatPlugin: PDF Input running
on /tmp/calibre_0.8.52_tmp_bfRfMX/IOtrAZ.pdf
Converting file to html...
Retrieving document metadata...
Generating manifest...
Rendering manifest...
Parsing all content...
Parsing index.html ...
Initial parse failed, using more forgiving parsers
Parsing index.html as HTML
Skipping invalid href: 'http://www)\\.([[:'
Traceback (most recent call last):
File "site-packages/calibre/ebooks/oeb/reader.py", line 204, in _manifest_add_missing
File "site-packages/calibre/ebooks/oeb/base.py", line 356, in urlnormalize
File "urlparse.py", line 134, in urlparse
File "urlparse.py", line 182, in urlsplit
ValueError: Invalid IPv6 URL
Referenced file 'mailto%3a2%40example.edu' not found
Referenced file 'file%3a//usr/local/mysql.dsn' not found
Traceback (most recent call last):
File "site.py", line 58, in main
File "site-packages/calibre/utils/ipc/worker.py", line 191, 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 988, in run
File "site-packages/calibre/ebooks/conversion/plumber.py", line 1143, in create_oebbook
File "site-packages/calibre/ebooks/oeb/reader.py", line 70, in __call__
File "site-packages/calibre/ebooks/oeb/reader.py", line 655, in _all_from_opf
File "site-packages/calibre/ebooks/oeb/reader.py", line 329, in _spine_from_opf
File "site-packages/calibre/ebooks/oeb/reader.py", line 294, in _spine_add_extra
File "site-packages/calibre/ebooks/oeb/base.py", line 356, in urlnormalize
File "urlparse.py", line 134, in urlparse
File "urlparse.py", line 182, in urlsplit
ValueError: Invalid IPv6 URL