[Dusk]

Here are the error messages from epubcheck (specifically, Threepress's Web-based validation service) concerning an ePub file I'm trying to validate:

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ERROR: first-time-the-eternal-dungeon-13.epub/toc.ncx(17): element "navMap" incomplete; missing required element "navPoint"

ERROR: first-time-the-eternal-dungeon-13.epub/toc.ncx(2): assertion failed: first playOrder value is not 1

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I'm using Smashwords's Meatgrinder for the conversion of the DOC file. I'm in touch with Smashwords's customer service concerning this, but since they're not experts on ePub code (and I certainly am not), I thought I'd try you folks as well.

What's mysterious about this particular situation is that the DOC that's being converted is an abridged version of a DOC file which, when converted to ePub by the Meatgrinder, *did* pass epubcheck. So I'm mystified as to why the converted abridgement isn't passing.