[TriOpticon]

I am not sure what this error means. I have not touched the settings on conversion. I simply use the defaults. I have 2 mobi files that give this error. The others converted fine. When I try to view the file in Calibre I get the same error. I can view these mobi files in Mobipocket reader for PC.

Any suggestions? If this is a bug, how do I report it?

calibre, version 0.8.18

Extracting text...
Adding anchors...
Extracting images...
Cleaning up HTML...
Parsing HTML...
Converting style information to CSS...
Extracting text...
Adding anchors...
Extracting images...
Cleaning up HTML...
Parsing HTML...
Converting style information to CSS...
Python function terminated unexpectedly
'NoneType' object has no attribute 'tag' (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 187, 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 944, in run
File "site-packages\calibre\customize\conversion.py", line 204, in __call__
File "site-packages\calibre\ebooks\mobi\input.py", line 27, in convert
File "site-packages\calibre\ebooks\mobi\reader.py", line 406, in extract_content
File "site-packages\calibre\ebooks\mobi\reader.py", line 657, in upshift_markup
AttributeError: 'NoneType' object has no attribute 'tag'