Quote:
Originally Posted by CharsDox
calibre.ebooks.oeb.transforms.split.SplitError: Could not find reasonable point at which to split: index.html Sub-tree size: 2697 KB
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This means when creating the epub, calibre couldn't determine a natural place to split the resultant html. The ePub spec requires the blocks of html be less then 300k and calibre defaults to breaking them into 260k size chunks. Most ereader devices won't read the book unless this is done.
There are three things you can try.
1st - Run the conversion with Treat each line as a paragraph option set in the PDB input. See attached for where you will find this option.
2nd - Run the conversion with the Assume print formatting option set in the PDB input. See attached for where you will find this option.
3rd - Run the conversion with a directory set under the debug option (see attached). This will give you the book at various stages of HTML processing after the conversion is run. You can open The input (or other stage) with SIGIL then save it as an ePub file then convert that ePub to ePub conversion to clean things up.
Hopefully one of the first two options will work. It would be easiest if one of them did, but if not the third option will work with a little more manual intervention.