A recent Help file I created works great in the directory where it was
created. Moving it to another directory and opening it causes the
advanced features (Text Zoom, Next, & Previous) to not be displayed
and, before opening, this error message pops up:

HTML Help Author Message

The window name "main" passed to HH_GET_WIN_TYPE has not been specified

It works every time in the creation directory and it fails to load
properly every time in any other directory.

This particular Help file can be downloaded at:
http://mykindred.com/gedcom55/gedcom55.zip

I would appreciate any help.

thanks,
Tom Cloud