In your table of contents ("A Martian Odyssey_002.htm") file you have:
Code:
<div class="center">
<a href="005">THE WORLDS OF IF</a>
</div>
I'm guessing that href (that really IS pointing to something unmanifested) was intended to be
Code:
../Text/A%20Martian%20Odyssey_0007.htm#Ref_005
It's really unfortunate that the actual
"reference(s) of some kind that point(s) to this resource" isn't identified (files and line numbers where they occur) as well in this type of error message. In situations like this, that info would be much handier than the path to a clearly unmanifested, non-existent file alone would be.
For future reference, when one of these types of errors has you going bug-eyed, just search all html files for the last part of that bogus file path in the error message. For example:
Code:
OEBPS/Text/fubared_href_attribute
You would search all html files for something like:
Code:
href="fubared_href_attribute"