For anyone following this conversation now or in the future, I would like to provide at least one help on InDesign 2015 CC’s problem with index entries not found. My problem that I described above was entirely about the fact that the export to ePub does not seem to support index entries with a page range. In other words, when you create an index entry in ID and specify anything other than “Current Page” as the type, it works great for the index generated for the print version. But when you export that book to ePub, ID seems to be confused by the fact that there are two page numbers listed (for example, 14-16), but only one index marker (on page 14). So it generates an error “page anchor not found” for every one of the entries with the page range. In my book with the problems, I opened all of the book files and the index panel and I had to go through every entry in the index panel, double-clicking every entry with a page range and editing it to just “Current Page.” Then I was able to generate the new index and export to ePub and all 200 errors vanished. Unfortunately, I could not find this behavior described anywhere online, including Adobe’s help pages. It took me over 2 hours to trouble-shoot and another hour to individually edit 200 index entries. It would be really nice if Adobe found a work-around for this problem. A simple solution would be to give us a check box in the generate index dialog box that would override all individual index types to be “Current Page.” Then, at least the index entries would not have to be edited individually. And it would be great if this was documented in Adobe’s help.

Have any of those who posted to this thread found a solution yet? I have the same issue 200 times over. I have a 240 page book (30 plus files compiled into a book file) with hundreds of index entries. The very last thing I did to this book was to update the index. Then I export to ePub. The exporting process informs me of over 200 “page anchor not found” errors. When I try to validate, I get over 200 “referenced resource missing in the package” all referring to the index. There is no way I can fix these one by one and I wouldn’t know where to start since InDesign built the index from the index markers minutes ago, then after exporting, InDesign cannot find those very same markers that are still in the very same place. Sounds like a bug. But I can’t deliver a file to a client if it won’t validate. Anyone with ideas?