Hyper-indexing works crudely, by forcing code onto the end of the index entry with
the | feature; this puts a hyperlink around the printed page numbers. It will not proceed if the author has already used the | specifier for something like emboldening entries. That
would make Makeindex fail (cannot have two | specifiers). The solution is for the author
to use generic coding, and put in the requisite \hyperpage in his/her own macros along
with the boldness.