Converting CHM to X (epub or pdf) no longer working. Input Error in

Bug #1796889 reported by Marcus Davis on 2018-10-09
This bug affects 2 people
Affects Status Importance Assigned to Milestone

Bug Description

I have tried over 10 different chm files on both mac and windows.
Failed Conversion see Error log below:

calibre, version 3.32.0 (darwin, embedded-python: True)
Conversion error: Failed: Convert book 1 of 1 (ChmTitle)

Convert book 1 of 1 (ChmTitle)
Conversion options changed from defaults:
  cover: u'/var/folders/k0/5cmy0ntx6qv6t5vkcfdzpb0m0000gn/C/calibre_3.32.0_tmp_6SQxnm/sApkP4.jpeg'
  read_metadata_from_opf: u'/var/folders/k0/5cmy0ntx6qv6t5vkcfdzpb0m0000gn/C/calibre_3.32.0_tmp_6SQxnm/EjI0l3.opf'
  verbose: 2
Resolved conversion options
calibre version: 3.32.0
{'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'/var/folders/k0/5cmy0ntx6qv6t5vkcfdzpb0m0000gn/C/calibre_3.32.0_tmp_6SQxnm/sApkP4.jpeg',
 'debug_pipeline': None,
 'dehyphenate': True,
 'delete_blank_paragraphs': True,
 'disable_font_rescaling': False,
 'dont_split_on_page_breaks': False,
 'duplicate_links_in_toc': False,
 'embed_all_fonts': False,
 'embed_font_family': None,
 'enable_heuristics': False,
 'epub_flatten': False,
 'epub_inline_toc': False,
 'epub_toc_at_end': False,
 'epub_version': u'2',
 'expand_css': False,
 'extra_css': None,
 'extract_to': None,
 'filter_css': u'',
 'fix_indents': True,
 'flow_size': 260,
 'font_size_mapping': None,
 'format_scene_breaks': True,
 'html_unwrap_factor': 0.4,
 'input_encoding': None,
 'input_profile': <calibre.customize.profiles.InputProfile object at 0x107fe5710>,
 '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,
 'no_chapters_in_toc': False,
 'no_default_epub_cover': False,
 'no_inline_navbars': False,
 'no_svg_cover': False,
 'output_profile': <calibre.customize.profiles.OutputProfile object at 0x107fe5ad0>,
 'page_breaks_before': u"//*[name()='h1' or name()='h2']",
 'prefer_metadata_cover': False,
 'preserve_cover_aspect_ratio': False,
 'pretty_print': True,
 'pubdate': None,
 'publisher': None,
 'rating': None,
 'read_metadata_from_opf': u'/var/folders/k0/5cmy0ntx6qv6t5vkcfdzpb0m0000gn/C/calibre_3.32.0_tmp_6SQxnm/EjI0l3.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,
 'smarten_punctuation': False,
 'sr1_replace': None,
 'sr1_search': None,
 'sr2_replace': None,
 'sr2_search': None,
 'sr3_replace': None,
 'sr3_search': None,
 'start_reading_at': None,
 'subset_embedded_fonts': False,
 'tags': None,
 'timestamp': None,
 'title': None,
 'title_sort': None,
 'toc_filter': None,
 'toc_threshold': 6,
 'toc_title': None,
 'transform_css_rules': '[]',
 'unsmarten_punctuation': False,
 'unwrap_lines': True,
 'use_auto_toc': False,
 'verbose': 2}
Python function terminated unexpectedly: Objects/longobject.c:998: bad argument to internal function
InputFormatPlugin: CHM Input running
on /var/folders/k0/5cmy0ntx6qv6t5vkcfdzpb0m0000gn/C/calibre_3.32.0_tmp_6SQxnm/oY51lr.chm
Processing CHM...
Opening CHM file
Traceback (most recent call last):
  File "/Applications/", line 154, in main
    return run_entry_point()
  File "/Applications/", line 114, in run_entry_point
    return getattr(pmod, func)()
  File "site-packages/calibre/utils/ipc/", line 199, in main
  File "site-packages/calibre/gui2/convert/", line 42, in gui_convert_override
  File "site-packages/calibre/gui2/convert/", line 27, in gui_convert
  File "site-packages/calibre/ebooks/conversion/", line 1106, in run
  File "site-packages/calibre/customize/", line 244, in __call__
  File "site-packages/calibre/ebooks/conversion/plugins/", line 55, in convert
  File "site-packages/calibre/ebooks/conversion/plugins/", line 24, in _chmtohtml
  File "site-packages/calibre/ebooks/chm/", line 51, in __init__
  File "site-packages/calibre/utils/chm/", line 221, in LoadCHM
  File "site-packages/calibre/utils/chm/", line 257, in GetArchiveInfo
SystemError: Objects/longobject.c:998: bad argument to internal function

This is a bug in chmlib (the library that calibre uses to process CHM
files). Sadly this library is not maintained anymore. It's on my TODO
list to take over maintenance of it, if possible, but given the
constraints on my time, it may not happen anytime soon.

Graham Wheeler (t-gram) wrote :

This also affects viewing CHM files with the included ebook-viewer as that goes through the same code path.

Graham Wheeler (t-gram) wrote :

I wonder if this was not introduced by this commit in 3.32:

That took the 'l' suffix off the numeric arguments which looks like it was done as part of a Python 2 to 3 upgrade process, but if Python 2 is still being used may have something to do with it?

Graham Wheeler (t-gram) wrote :

I've confirmed that reverting the change to that was made in that pull request fixes the problem.

Fixed in branch master. The fix will be in the next release. calibre is usually released every alternate Friday.

 status fixreleased

Changed in calibre:
status: New → Fix Released
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