[strixv]

Trying to run this recipe results consistently in an Error. Following is the trace, which ends with:
AttributeError: 'NoneType' object has no attribute 'findNext'

Trace:
Fetch news from Harper's Magazine - articles from printed edition
Resolved conversion options
calibre version: 0.9.24
{'asciiize': False,
'author_sort': None,
'authors': None,
'base_font_size': 0,
'book_producer': None,
'change_justification': 'original',
'chapter': None,
'chapter_mark': 'pagebreak',
'comments': None,
'cover': None,
'debug_pipeline': None,
'dehyphenate': True,
'delete_blank_paragraphs': True,
'disable_font_rescaling': False,
'dont_compress': False,
'dont_download_recipe': False,
'duplicate_links_in_toc': False,
'embed_font_family': None,
'enable_heuristics': False,
'extra_css': None,
'extract_to': None,
'filter_css': None,
'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 0x0000000004DF9128>,
'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,
'linearize_tables': False,
'lrf': 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_file_type': 'old',
'mobi_ignore_margins': False,
'mobi_keep_original_images': False,
'mobi_toc_at_start': False,
'no_chapters_in_toc': False,
'no_inline_navbars': True,
'no_inline_toc': False,
'output_profile': <calibre.customize.profiles.KindlePaperWhiteOutp ut object at 0x0000000004DF9780>,
'page_breaks_before': None,
'personal_doc': '[PDOC]',
'prefer_author_sort': False,
'prefer_metadata_cover': False,
'pretty_print': False,
'pubdate': None,
'publisher': None,
'rating': None,
'read_metadata_from_opf': None,
'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': None,
'series': None,
'series_index': None,
'share_not_sync': False,
'smarten_punctuation': False,
'sr1_replace': '',
'sr1_search': '',
'sr2_replace': '',
'sr2_search': '',
'sr3_replace': '',
'sr3_search': '',
'start_reading_at': None,
'subset_embedded_fonts': False,
'tags': None,
'test': False,
'timestamp': None,
'title': None,
'title_sort': None,
'toc_filter': None,
'toc_threshold': 6,
'toc_title': None,
'unsmarten_punctuation': False,
'unwrap_lines': True,
'use_auto_toc': False,
'verbose': 2}
InputFormatPlugin: Recipe Input running
Using custom recipe
Downloading
Fetching http://harpers.org/archive/2013/04/l...-807/?single=1
Processing images...
Recursion limit reached. Skipping links in http://harpers.org/archive/2013/04/l...-807/?single=1
http://harpers.org/archive/2013/04/l...-807/?single=1 saved to C:\Users\Jose\AppData\Local\Temp\calibre_peaps3\vy oxn1_plumber\feed_0\article_0\index.xhtml
Downloading
Fetching http://harpers.org/archive/2013/04/b...lish/?single=1
Downloaded article: Letters from http://harpers.org/archive/2013/04/letters-807/
Processing images...
Recursion limit reached. Skipping links in http://harpers.org/archive/2013/04/b...lish/?single=1
http://harpers.org/archive/2013/04/b...lish/?single=1 saved to C:\Users\Jose\AppData\Local\Temp\calibre_peaps3\vy oxn1_plumber\feed_0\article_1\index.xhtml
Downloading
Fetching http://harpers.org/archive/2013/04/a...news/?single=1
Downloaded article: Broken English from http://harpers.org/archive/2013/04/broken-english/
Processing images...
Recursion limit reached. Skipping links in http://harpers.org/archive/2013/04/a...news/?single=1
http://harpers.org/archive/2013/04/a...news/?single=1 saved to C:\Users\Jose\AppData\Local\Temp\calibre_peaps3\vy oxn1_plumber\feed_0\article_2\index.xhtml
Downloading
Fetching http://harpers.org/archive/2013/04/h...-349/?single=1
Downloaded article: A Bit of Good News from http://harpers.org/archive/2013/04/a-bit-of-good-news/
Processing images...
Recursion limit reached. Skipping links in http://harpers.org/archive/2013/04/h...-349/?single=1
http://harpers.org/archive/2013/04/h...-349/?single=1 saved to C:\Users\Jose\AppData\Local\Temp\calibre_peaps3\vy oxn1_plumber\feed_0\article_3\index.xhtml
Downloading
Downloaded article: FetchingHarper’s Index fromhttp://harpers.org/archive/2013/04/parenthood-revisited/?single=1
http://harpers.org/archive/2013/04/harpers-index-349/
Processing images...
Recursion limit reached. Skipping links in http://harpers.org/archive/2013/04/p...ited/?single=1
http://harpers.org/archive/2013/04/p...ited/?single=1 saved to C:\Users\Jose\AppData\Local\Temp\calibre_peaps3\vy oxn1_plumber\feed_0\article_4\index.xhtml
Downloading
Fetching http://harpers.org/archive/2013/04/u...1449/?single=1
Downloaded article: Parenthood Revisited from http://harpers.org/archive/2013/04/p...ood-revisited/
Processing images...
Recursion limit reached. Skipping links in http://harpers.org/archive/2013/04/u...1449/?single=1
http://harpers.org/archive/2013/04/u...1449/?single=1 saved to C:\Users\Jose\AppData\Local\Temp\calibre_peaps3\vy oxn1_plumber\feed_0\article_5\index.xhtml
Downloading
Fetching http://harpers.org/archive/2013/04/n...uter/?single=1
Downloaded article: [untitled] from http://harpers.org/archive/2013/04/untitled-1449/
Processing images...
Recursion limit reached. Skipping links in http://harpers.org/archive/2013/04/n...uter/?single=1
http://harpers.org/archive/2013/04/n...uter/?single=1 saved to C:\Users\Jose\AppData\Local\Temp\calibre_peaps3\vy oxn1_plumber\feed_0\article_6\index.xhtml
Downloading
Fetching http://harpers.org/archive/2013/04/i...road/?single=1
Downloaded article: Never Say Neuter from http://harpers.org/archive/2013/04/never-say-neuter/
Processing images...
Recursion limit reached. Skipping links in http://harpers.org/archive/2013/04/i...road/?single=1
http://harpers.org/archive/2013/04/i...road/?single=1 saved to C:\Users\Jose\AppData\Local\Temp\calibre_peaps3\vy oxn1_plumber\feed_0\article_7\index.xhtml
Downloading
Fetching http://harpers.org/archive/2013/04/s...fort/?single=1
Downloaded article: Incoherence Abroad from http://harpers.org/archive/2013/04/incoherence-abroad/
Processing images...
Recursion limit reached. Skipping links in http://harpers.org/archive/2013/04/s...fort/?single=1
http://harpers.org/archive/2013/04/s...fort/?single=1 saved to C:\Users\Jose\AppData\Local\Temp\calibre_peaps3\vy oxn1_plumber\feed_0\article_8\index.xhtml
Downloading
Fetching http://harpers.org/archive/2013/04/n...sted/?single=1
Downloaded article: Southern Discomfort from http://harpers.org/archive/2013/04/southern-discomfort/
Processing images...
Recursion limit reached. Skipping links in http://harpers.org/archive/2013/04/n...sted/?single=1
http://harpers.org/archive/2013/04/n...sted/?single=1 saved to C:\Users\Jose\AppData\Local\Temp\calibre_peaps3\vy oxn1_plumber\feed_0\article_9\index.xhtml
Downloading
Fetching http://harpers.org/archive/2013/04/s...ment/?single=1
Downloaded article: Not Interested from http://harpers.org/archive/2013/04/not-interested/
Processing images...
Recursion limit reached. Skipping links in http://harpers.org/archive/2013/04/s...ment/?single=1
http://harpers.org/archive/2013/04/s...ment/?single=1 saved to C:\Users\Jose\AppData\Local\Temp\calibre_peaps3\vy oxn1_plumber\feed_0\article_10\index.xhtml
Downloading
Fetching http://harpers.org/archive/2013/04/l...eory/?single=1
Downloaded article: Stone Stilts, Grand Staircase–Escalante National Monument from http://harpers.org/archive/2013/04/s...onal-monument/
Processing images...
Recursion limit reached. Skipping links in http://harpers.org/archive/2013/04/l...eory/?single=1
http://harpers.org/archive/2013/04/l...eory/?single=1 saved to C:\Users\Jose\AppData\Local\Temp\calibre_peaps3\vy oxn1_plumber\feed_0\article_11\index.xhtml
Downloading
Fetching http://harpers.org/archive/2013/04/l...ltet/?single=1
Downloaded article: Little Bang Theory from http://harpers.org/archive/2013/04/little-bang-theory/
Processing images...
Recursion limit reached. Skipping links in http://harpers.org/archive/2013/04/l...ltet/?single=1
http://harpers.org/archive/2013/04/l...ltet/?single=1 saved to C:\Users\Jose\AppData\Local\Temp\calibre_peaps3\vy oxn1_plumber\feed_0\article_12\index.xhtml
Downloading
Fetching http://harpers.org/archive/2013/04/v...ties/?single=1
Downloaded article: Limhamnsfältet from http://harpers.org/archive/2013/04/limhamnsfaltet/
Processing images...
Recursion limit reached. Skipping links in http://harpers.org/archive/2013/04/v...ties/?single=1
http://harpers.org/archive/2013/04/v...ties/?single=1 saved to C:\Users\Jose\AppData\Local\Temp\calibre_peaps3\vy oxn1_plumber\feed_0\article_13\index.xhtml
Downloading
Fetching http://harpers.org/archive/2013/04/un/?single=1
Downloaded article: Visible Cities from http://harpers.org/archive/2013/04/visible-cities/
Processing images...
Recursion limit reached. Skipping links in http://harpers.org/archive/2013/04/un/?single=1
http://harpers.org/archive/2013/04/un/?single=1 saved to C:\Users\Jose\AppData\Local\Temp\calibre_peaps3\vy oxn1_plumber\feed_0\article_14\index.xhtml
Downloading
Fetching http://harpers.org/archive/2013/04/u...em-2/?single=1
Downloaded article: Peter, Arlington National Cemetery, Arlington, Virginia from http://harpers.org/archive/2013/04/un/
Processing images...
Recursion limit reached. Skipping links in http://harpers.org/archive/2013/04/u...em-2/?single=1
http://harpers.org/archive/2013/04/u...em-2/?single=1 saved to C:\Users\Jose\AppData\Local\Temp\calibre_peaps3\vy oxn1_plumber\feed_0\article_15\index.xhtml
Downloading
Fetching http://harpers.org/archive/2013/04/h...ight/?single=1
Downloaded article: Untitled Poem from http://harpers.org/archive/2013/04/untitled-poem-2/
Processing images...
Recursion limit reached. Skipping links in http://harpers.org/archive/2013/04/h...ight/?single=1
http://harpers.org/archive/2013/04/h...ight/?single=1 saved to C:\Users\Jose\AppData\Local\Temp\calibre_peaps3\vy oxn1_plumber\feed_0\article_16\index.xhtml
Downloading
Downloaded article: Helicopter Take-Off at Night from http://harpers.org/archive/2013/04/h...night/Fetching
http://harpers.org/archive/2013/04/t...ng-2/?single=1
Processing images...
Recursion limit reached. Skipping links in http://harpers.org/archive/2013/04/t...ng-2/?single=1
http://harpers.org/archive/2013/04/t...ng-2/?single=1 saved to C:\Users\Jose\AppData\Local\Temp\calibre_peaps3\vy oxn1_plumber\feed_0\article_17\index.xhtml
Downloading
Fetching http://harpers.org/archive/2013/04/b...ight/?single=1
Downloaded article: The Awakening from http://harpers.org/archive/2013/04/the-awakening-2/
Processing images...
Recursion limit reached. Skipping links in http://harpers.org/archive/2013/04/b...ight/?single=1
http://harpers.org/archive/2013/04/b...ight/?single=1 saved to C:\Users\Jose\AppData\Local\Temp\calibre_peaps3\vy oxn1_plumber\feed_0\article_18\index.xhtml
Downloading
Fetching http://harpers.org/archive/2013/04/a...ruth/?single=1
Downloaded article: Blinded by the Right? from http://harpers.org/archive/2013/04/b...-by-the-right/
Processing images...
Recursion limit reached. Skipping links in http://harpers.org/archive/2013/04/a...ruth/?single=1
http://harpers.org/archive/2013/04/a...ruth/?single=1 saved to C:\Users\Jose\AppData\Local\Temp\calibre_peaps3\vy oxn1_plumber\feed_0\article_19\index.xhtml
Downloading
Fetching http://harpers.org/archive/2013/04/afterword/?single=1
Downloaded article: A Delicate Truth from http://harpers.org/archive/2013/04/a-delicate-truth/
Processing images...
Recursion limit reached. Skipping links in http://harpers.org/archive/2013/04/afterword/?single=1
http://harpers.org/archive/2013/04/afterword/?single=1 saved to C:\Users\Jose\AppData\Local\Temp\calibre_peaps3\vy oxn1_plumber\feed_0\article_20\index.xhtml
Downloading
Fetching http://harpers.org/archive/2013/04/m...ight/?single=1
Downloaded article: Afterword from http://harpers.org/archive/2013/04/afterword/
Processing images...
Recursion limit reached. Skipping links in http://harpers.org/archive/2013/04/m...ight/?single=1
http://harpers.org/archive/2013/04/m...ight/?single=1 saved to C:\Users\Jose\AppData\Local\Temp\calibre_peaps3\vy oxn1_plumber\feed_0\article_21\index.xhtml
Downloading
Fetching http://harpers.org/archive/2013/04/o...nect/?single=1
Downloaded article: Martyrdoms of Light from http://harpers.org/archive/2013/04/martyrdoms-of-light/
Processing images...
Recursion limit reached. Skipping links in http://harpers.org/archive/2013/04/o...nect/?single=1
http://harpers.org/archive/2013/04/o...nect/?single=1 saved to C:\Users\Jose\AppData\Local\Temp\calibre_peaps3\vy oxn1_plumber\feed_0\article_22\index.xhtml
Downloading
Fetching http://harpers.org/archive/2013/04/t...hing/?single=1
Downloaded article: Only Connect from http://harpers.org/archive/2013/04/only-connect/
Processing images...
Recursion limit reached. Skipping links in http://harpers.org/archive/2013/04/t...hing/?single=1
http://harpers.org/archive/2013/04/t...hing/?single=1 saved to C:\Users\Jose\AppData\Local\Temp\calibre_peaps3\vy oxn1_plumber\feed_0\article_23\index.xhtml
Downloading
Fetching http://harpers.org/archive/2013/04/l...time/?single=1
Downloaded article: The Super Bowl! (Of Fishing) from http://harpers.org/archive/2013/04/t...wl-of-fishing/
Processing images...
Recursion limit reached. Skipping links in http://harpers.org/archive/2013/04/l...time/?single=1
http://harpers.org/archive/2013/04/l...time/?single=1 saved to C:\Users\Jose\AppData\Local\Temp\calibre_peaps3\vy oxn1_plumber\feed_0\article_24\index.xhtml
Downloading
Fetching http://harpers.org/archive/2013/04/n...s-45/?single=1
Downloaded article: Life During Wartime from http://harpers.org/archive/2013/04/life-during-wartime/
Processing images...
Recursion limit reached. Skipping links in http://harpers.org/archive/2013/04/n...s-45/?single=1
http://harpers.org/archive/2013/04/n...s-45/?single=1 saved to C:\Users\Jose\AppData\Local\Temp\calibre_peaps3\vy oxn1_plumber\feed_0\article_25\index.xhtml
Downloading
Fetching http://harpers.org/archive/2013/04/t...rent/?single=1
Downloaded article: New Books from http://harpers.org/archive/2013/04/new-books-45/
Processing images...
Recursion limit reached. Skipping links in http://harpers.org/archive/2013/04/t...rent/?single=1
http://harpers.org/archive/2013/04/t...rent/?single=1 saved to C:\Users\Jose\AppData\Local\Temp\calibre_peaps3\vy oxn1_plumber\feed_0\article_26\index.xhtml
Downloading
Fetching http://harpers.org/archive/2013/04/t...nary/?single=1
Downloaded article: Time’s Current from http://harpers.org/archive/2013/04/times-current/
Processing images...
Recursion limit reached. Skipping links in http://harpers.org/archive/2013/04/t...nary/?single=1
http://harpers.org/archive/2013/04/t...nary/?single=1 saved to C:\Users\Jose\AppData\Local\Temp\calibre_peaps3\vy oxn1_plumber\feed_0\article_27\index.xhtml
Downloading
Fetching http://harpers.org/archive/2013/04/for-short/?single=1
Downloaded article: The Revolutionary from http://harpers.org/archive/2013/04/the-revolutionary/
Processing images...
Recursion limit reached. Skipping links in http://harpers.org/archive/2013/04/for-short/?single=1
http://harpers.org/archive/2013/04/for-short/?single=1 saved to C:\Users\Jose\AppData\Local\Temp\calibre_peaps3\vy oxn1_plumber\feed_0\article_28\index.xhtml
Downloading
Fetching http://harpers.org/archive/2013/04/f...s-49/?single=1
Downloaded article: For Short from http://harpers.org/archive/2013/04/for-short/
Processing images...
Recursion limit reached. Skipping links in http://harpers.org/archive/2013/04/f...s-49/?single=1
http://harpers.org/archive/2013/04/f...s-49/?single=1 saved to C:\Users\Jose\AppData\Local\Temp\calibre_peaps3\vy oxn1_plumber\feed_0\article_29\index.xhtml
Downloaded article: Findings from http://harpers.org/archive/2013/04/findings-49/
Python function terminated unexpectedly
'NoneType' object has no attribute 'findNext' (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 189, in main
File "site-packages\calibre\gui2\convert\gui_conversion.py", line 25, in gui_convert
File "site-packages\calibre\ebooks\conversion\plumber.py", line 1009, in run
File "site-packages\calibre\customize\conversion.py", line 239, in __call__
File "site-packages\calibre\ebooks\conversion\plugins\recipe_ input.py", line 114, in convert
File "site-packages\calibre\web\feeds\news.py", line 1000, in download
File "<string>", line 106, in cleanup
AttributeError: 'NoneType' object has no attribute 'findNext'