I was able to get these problem docs to convert after some tinkering.
- All docs are saved as HTML, filtered in Word 2010
- All docs have exactly two graphics (cover & flyleaf) saved as .JPG.
- All docs are converted .ZIP > .MOBI
- The book cover image is the same .JPG as used for the doc.
Using this format, I've converted dozens of docs, over and over many times with no issues. I had three docs that would not convert beyond 47%. Prior to adding graphics, one of these docs converted 100%. So, I tinkered.
1. Removed the graphics from these docs
2. Problem docs converted without graphics
3. Edited/Re-created book and flyleaf graphics
4. Added newbook and flyleaf graphics to the docs
5. Problem docs convert
Each doc now converts to 100% in Calibre, each less than 1m conversion time. Visually, it's the same doc...2 graphics + text. I'd like to understand how graphics affect conversion. Is it size?...format?...dpi?...etc. I don't see any connection between these problem docs or how they are different from previous ones that converted successfully.
One thing I did notice was that graphics pasted directly into Word were saved as .PNG in the <BOOKTITLE>_FILES directory when saved as .HTML. Of the three problem docs, only one had .PNG graphics, the other two used .JPG.
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